diff --git a/teavm-jso-impl/src/main/java/org/teavm/jso/plugin/AstWriter.java b/teavm-jso-impl/src/main/java/org/teavm/jso/plugin/AstWriter.java
index 27ac6aeba..0d96c87dd 100644
--- a/teavm-jso-impl/src/main/java/org/teavm/jso/plugin/AstWriter.java
+++ b/teavm-jso-impl/src/main/java/org/teavm/jso/plugin/AstWriter.java
@@ -162,7 +162,7 @@ public class AstWriter {
                 print((ArrayComprehension) node);
                 break;
             case Token.GETPROP:
-                print((PropertyGet) node, precedence);
+                print((PropertyGet) node);
                 break;
             case Token.GENEXPR:
                 print((GeneratorExpression) node);
@@ -208,7 +208,7 @@ public class AstWriter {
                 print((ConditionalExpression) node, precedence);
                 break;
             case Token.GETELEM:
-                print((ElementGet) node, precedence);
+                print((ElementGet) node);
                 break;
             case Token.LETEXPR:
                 print((LetNode) node);
@@ -425,6 +425,7 @@ public class AstWriter {
                 print(cc.getCatchCondition());
             }
             writer.append(')');
+            print(cc.getBody());
         }
         if (node.getFinallyBlock() != null) {
             writer.ws().append("finally ");
@@ -469,48 +470,40 @@ public class AstWriter {
         writer.append(';');
     }
 
-    private void print(ElementGet node, int precedence) throws IOException {
-        if (precedence < PRECEDENCE_MEMBER) {
-            writer.append('(');
-        }
+    private void print(ElementGet node) throws IOException {
         print(node.getTarget(), PRECEDENCE_MEMBER);
-        if (precedence < PRECEDENCE_MEMBER) {
-            writer.append(')');
-        }
         writer.append('[');
         print(node.getElement());
         writer.append(']');
     }
 
-    private void print(PropertyGet node, int precedence) throws IOException {
-        if (precedence < PRECEDENCE_MEMBER) {
-            writer.append('(');
-        }
-        print(node.getLeft());
-        if (precedence < PRECEDENCE_MEMBER) {
-            writer.append(')');
-        }
+    private void print(PropertyGet node) throws IOException {
+        print(node.getLeft(), PRECEDENCE_MEMBER);
         writer.ws().append('.').ws();
         print(node.getRight());
     }
 
     private void print(FunctionCall node, int precedence) throws IOException {
-        if (node instanceof NewExpression) {
-            writer.append("new ");
-        }
         if (precedence < PRECEDENCE_FUNCTION) {
             writer.append('(');
         }
-        print(node.getTarget(), PRECEDENCE_FUNCTION);
-        if (precedence < PRECEDENCE_FUNCTION) {
-            writer.append(')');
+        int innerPrecedence = node instanceof NewExpression ? PRECEDENCE_FUNCTION - 1 : PRECEDENCE_FUNCTION;
+        if (node instanceof NewExpression) {
+            writer.append("new ");
         }
+        print(node.getTarget(), innerPrecedence);
         writer.append('(');
         printList(node.getArguments());
         writer.append(')');
         if (node instanceof NewExpression) {
             writer.ws();
-            print(((NewExpression) node).getInitializer());
+            NewExpression newExpr = (NewExpression) node;
+            if (newExpr.getInitializer() != null) {
+                print(newExpr.getInitializer());
+            }
+        }
+        if (precedence < PRECEDENCE_FUNCTION) {
+            writer.append(')');
         }
     }
 
@@ -526,7 +519,6 @@ public class AstWriter {
         if (precedence < PRECEDENCE_COND) {
             writer.append(')');
         }
-        print(node.getTestExpression(), precedence);
     }
 
     private void printList(List<? extends AstNode> nodes) throws IOException {
@@ -613,19 +605,19 @@ public class AstWriter {
                 print(node.getElements().get(i));
             }
         }
-        printList(node.getElements());
         writer.append('}');
     }
 
     private void print(ObjectProperty node) throws IOException {
-        StringBuilder sb = new StringBuilder();
         if (node.isGetterMethod()) {
-            sb.append("get ");
+            writer.append("get ");
         } else if (node.isSetterMethod()) {
-            sb.append("set ");
+            writer.append("set ");
         }
         print(node.getLeft());
-        writer.ws().append(':').ws();
+        if (!node.isMethod()) {
+            writer.ws().append(':').ws();
+        }
         print(node.getRight());
     }
 
@@ -633,7 +625,7 @@ public class AstWriter {
         if (!node.isMethod()) {
             writer.append("function");
         }
-        if (node.getFunctionName().getString() != null) {
+        if (node.getFunctionName() != null) {
             writer.append(' ');
             print(node.getFunctionName());
         }
@@ -671,6 +663,11 @@ public class AstWriter {
     private void printUnary(UnaryExpression node, int precedence) throws IOException {
         int innerPrecedence = node.isPostfix() ? PRECEDENCE_POSTFIX : PRECEDENCE_PREFIX;
 
+
+        if (innerPrecedence > precedence) {
+            writer.append('(');
+        }
+
         if (!node.isPostfix()) {
             writer.append(AstNode.operatorToString(node.getType()));
             if (requiresWhitespaces(node.getType())) {
@@ -678,19 +675,15 @@ public class AstWriter {
             }
         }
 
-        if (innerPrecedence > precedence) {
-            writer.append('(');
-        }
-
         print(node.getOperand(), innerPrecedence);
 
-        if (innerPrecedence > precedence) {
-            writer.append(')');
-        }
-
         if (node.isPostfix()) {
             writer.append(AstNode.operatorToString(node.getType()));
         }
+
+        if (innerPrecedence > precedence) {
+            writer.append(')');
+        }
     }
 
     private void printInfix(InfixExpression node, int precedence) throws IOException {
@@ -760,7 +753,7 @@ public class AstWriter {
         print(node.getRight(), rightPrecedence);
 
         if (innerPrecedence > precedence) {
-            writer.append('(');
+            writer.append(')');
         }
     }
 
diff --git a/teavm-jso-impl/src/test/java/org/teavm/jso/plugin/AstWriterTest.java b/teavm-jso-impl/src/test/java/org/teavm/jso/plugin/AstWriterTest.java
index 3bfd3281d..22b786acd 100644
--- a/teavm-jso-impl/src/test/java/org/teavm/jso/plugin/AstWriterTest.java
+++ b/teavm-jso-impl/src/test/java/org/teavm/jso/plugin/AstWriterTest.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.*;
 import java.io.IOException;
 import java.io.StringReader;
 import org.junit.Test;
-import org.junit.experimental.theories.suppliers.TestedOn;
 import org.mozilla.javascript.CompilerEnvirons;
+import org.mozilla.javascript.Context;
 import org.mozilla.javascript.ast.AstRoot;
 import org.teavm.codegen.SourceWriter;
 import org.teavm.codegen.SourceWriterBuilder;
@@ -94,10 +94,16 @@ public class AstWriterTest {
         assertThat(transform("{ foo(); bar(); }"), is("{foo();bar();}"));
     }
 
+    @Test
+    public void writesTryCatch() throws IOException {
+        assertThat(transform("try { foo(); } catch (e) { alert(e); }"), is("try {foo();}catch(e){alert(e);}"));
+        assertThat(transform("try { foo(); } finally { close(); }"), is("try {foo();}finally {close();}"));
+    }
+
     @Test
     public void writesFor() throws IOException {
-        assertThat(transform("for (var i = 0; i < array.length; ++i) foo(array[i]);"),
-                is("for(var i=0;i<array.length;++i)foo(array[i]);"));
+        assertThat(transform("for (var i = 0; i < array.length; ++i,++j) foo(array[i]);"),
+                is("for(var i=0;i<array.length;++i,++j)foo(array[i]);"));
     }
 
     @Test
@@ -135,16 +141,124 @@ public class AstWriterTest {
     @Test
     public void writesSwitch() throws IOException {
         assertThat(transform("switch (c) { "
-                + "case '?': matchAny(); break; "
+                + "case '.': case '?': matchAny(); break; "
                 + "case '*': matchSequence(); break;"
                 + "default: matchChar(c); break; } "),
-                is("switch(c){case '?':matchAny();break;case '*':matchSequence();break;"
+                is("switch(c){case '.':case '?':matchAny();break;case '*':matchSequence();break;"
                         + "default:matchChar(c);break;}"));
     }
 
+    @Test
+    public void writesLet() throws IOException {
+        assertThat(transform("let x = 1; alert(x);"), is("let x=1;alert(x);"));
+        assertThat(transform("let x = 1, y; alert(x,y);"), is("let x=1,y;alert(x,y);"));
+    }
+
+    @Test
+    public void writesConst() throws IOException {
+        assertThat(transform("const x = 1,y = 2; alert(x,y);"), is("const x=1,y=2;alert(x,y);"));
+    }
+
+    @Test
+    public void writesElementGet() throws IOException {
+        assertThat(transform("return array[i];"), is("return array[i];"));
+        assertThat(transform("return array[i][j];"), is("return array[i][j];"));
+        assertThat(transform("return (array[i])[j];"), is("return array[i][j];"));
+        assertThat(transform("return (a + b)[i];"), is("return (a+b)[i];"));
+        assertThat(transform("return a + b[i];"), is("return a+b[i];"));
+    }
+
+    @Test
+    public void writesPropertyGet() throws IOException {
+        assertThat(transform("return array.length;"), is("return array.length;"));
+        assertThat(transform("return (array).length;"), is("return array.length;"));
+        assertThat(transform("return (x + y).toString();"), is("return (x+y).toString();"));
+    }
+
+    @Test
+    public void writesFunctionCall() throws IOException {
+        assertThat(transform("return f(x);"), is("return f(x);"));
+        assertThat(transform("return (f)(x);"), is("return f(x);"));
+        assertThat(transform("return (f + g)(x);"), is("return (f+g)(x);"));
+    }
+
+    @Test
+    public void writesConstructorCall() throws IOException {
+        assertThat(transform("return new (f + g)(x);"), is("return new (f+g)(x);"));
+        assertThat(transform("return new f + g(x);"), is("return new f()+g(x);"));
+        assertThat(transform("return new f()(x);"), is("return new f()(x);"));
+        assertThat(transform("return (new f())(x);"), is("return new f()(x);"));
+        assertThat(transform("return new (f())(x);"), is("return new (f())(x);"));
+        assertThat(transform("return new f[0](x);"), is("return new f[0](x);"));
+        assertThat(transform("return (new f[0](x));"), is("return new f[0](x);"));
+    }
+
+    @Test
+    public void writesConditionalExpr() throws IOException {
+        assertThat(transform("return cond ? 1 : 0;"), is("return cond?1:0;"));
+        assertThat(transform("return a < b ? -1 : a > b ? 1 : 0;"), is("return a<b?-1:a>b?1:0;"));
+        assertThat(transform("return a < b ? -1 : (a > b ? 1 : 0);"), is("return a<b?-1:a>b?1:0;"));
+        assertThat(transform("return (a < b ? x == y : x != y) ? 1 : 0;"), is("return (a<b?x==y:x!=y)?1:0;"));
+        assertThat(transform("return a < b ? (x > y ? x : y) : z"), is("return a<b?(x>y?x:y):z;"));
+    }
+
+    @Test
+    public void writesRegExp() throws IOException {
+        assertThat(transform("return /[a-z]+/.match(text);"), is("return /[a-z]+/.match(text);"));
+        assertThat(transform("return /[a-z]+/ig.match(text);"), is("return /[a-z]+/ig.match(text);"));
+    }
+
+    @Test
+    public void writesArrayLiteral() throws IOException {
+        assertThat(transform("return [];"), is("return [];"));
+        assertThat(transform("return [a, b + c];"), is("return [a,b+c];"));
+    }
+
+    @Test
+    public void writesObjectLiteral() throws IOException {
+        assertThat(transform("return {};"), is("return {};"));
+        assertThat(transform("return { foo : bar };"), is("return {foo:bar};"));
+        assertThat(transform("return { foo : bar };"), is("return {foo:bar};"));
+        assertThat(transform("return { _foo : bar, get foo() { return this._foo; } };"),
+                is("return {_foo:bar,get foo(){return this._foo;}};"));
+    }
+
+    @Test
+    public void writesFunction() throws IOException {
+        assertThat(transform("return function f(x, y) { return x + y; };"),
+                is("return function f(x,y){return x+y;};"));
+    }
+
+    @Test
+    public void writesUnary() throws IOException {
+        assertThat(transform("return -a;"), is("return -a;"));
+        assertThat(transform("return -(a + b);"), is("return -(a+b);"));
+        assertThat(transform("return -a + b;"), is("return -a+b;"));
+        assertThat(transform("return (-a) + b;"), is("return -a+b;"));
+        assertThat(transform("return (-f)(x);"), is("return (-f)(x);"));
+        assertThat(transform("return typeof a;"), is("return typeof a;"));
+    }
+
+    @Test
+    public void writesPostfix() throws IOException {
+        assertThat(transform("return a++;"), is("return a++;"));
+    }
+
+    @Test
+    public void respectsPrecedence() throws IOException {
+        assertThat(transform("return a + b + c;"), is("return a+b+c;"));
+        assertThat(transform("return (a + b) + c;"), is("return a+b+c;"));
+        assertThat(transform("return a + (b + c);"), is("return a+b+c;"));
+        assertThat(transform("return a - b + c;"), is("return a-b+c;"));
+        assertThat(transform("return (a - b) + c;"), is("return a-b+c;"));
+        assertThat(transform("return a - (b + c);"), is("return a-(b+c);"));
+    }
+
     private String transform(String text) throws IOException {
+        sb.setLength(0);
         CompilerEnvirons env = new CompilerEnvirons();
         env.setRecoverFromErrors(true);
+        env.setLanguageVersion(Context.VERSION_1_8);
         JSParser factory = new JSParser(env);
         factory.enterFunction();
         AstRoot rootNode = factory.parse(new StringReader(text), null, 0);