diff --git a/lib/ast.js b/lib/ast.js
index 8faadae..f71b96e 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -49,6 +49,30 @@
         return false;
     }
 
+    function isExpressionES6(node) {
+        if (node == null) { return false; }
+        if (isExpression(node)) { return true; }
+        switch (node.type) {
+            case 'ArrowFunctionExpression':
+            case 'ClassExpression':
+            case 'TaggedTemplateExpression':
+            case 'YieldExpression':
+                return true;
+        }
+        return false;
+    }
+
+    function isPatternES6(node) {
+        if (node == null) { return false; }
+        switch (node.type) {
+            case 'AssignmentPattern':
+            case 'ArrayPattern':
+            case 'ObjectPattern':
+                return true;
+        }
+        return false;
+    }
+
     function isIterationStatement(node) {
         if (node == null) { return false; }
         switch (node.type) {
@@ -87,6 +111,16 @@
         return false;
     }
 
+    function isStatementES6(node) {
+        if (node == null) { return false; }
+        if (isStatement(node)) { return true; }
+        switch (node.type) {
+            case 'ForOfStatement':
+                return true;
+        }
+        return false;
+    }
+
     function isSourceElement(node) {
       return isStatement(node) || node != null && node.type === 'FunctionDeclaration';
     }
@@ -133,7 +167,10 @@
 
     module.exports = {
         isExpression: isExpression,
+        isExpressionES6: isExpressionES6,
+        isPatternES6: isPatternES6,
         isStatement: isStatement,
+        isStatementES6: isStatementES6,
         isIterationStatement: isIterationStatement,
         isSourceElement: isSourceElement,
         isProblematicIfStatement: isProblematicIfStatement,