diff --git a/languages/chef/parser/core.ts b/languages/chef/parser/core.ts
index e54082a..79e26a4 100644
--- a/languages/chef/parser/core.ts
+++ b/languages/chef/parser/core.ts
@@ -11,16 +11,13 @@ import * as R from "./regex";
 import * as C from "../types";
 
 /**
- * Ideally, this would convert past form of verb to present form. Due to
- * the requirement of an English dictionary for sufficient accuracy, we instead
- * require the past form to be the same as present form in Esolang Park. Thus,
- * this function is currently a no-op.
+ * Converts a verb to the past tense version of it
  *
- * @param verbed Past form of verb
- * @returns Present imperative form of verb
+ * @param verb Present form of verb
+ * @returns Past form of verb
  */
-const toPresentTense = (verbed: string) => {
-  return verbed;
+export const toPastTense = (verb: string) => {
+  return verb.endsWith('e') ? verb + "d" : verb + "ed"
 };
 
 /** Parse a string as an ingredient measure */
@@ -219,7 +216,7 @@ export const parseMethodStep = (line: string): C.ChefOperation => {
     // `Verb` [the `ingredient`] until `verbed`
     const matches = assertMatch(line, R.LoopEnderRegex);
     const ingredient = matches[1] || undefined;
-    const verb = toPresentTense(matches[2]);
+    const verb = matches[2];
     return {
       code: "LOOP-CLOSE",
       ing: ingredient,
diff --git a/languages/chef/parser/index.ts b/languages/chef/parser/index.ts
index 1bfa10a..d415f54 100644
--- a/languages/chef/parser/index.ts
+++ b/languages/chef/parser/index.ts
@@ -1,6 +1,6 @@
 import * as T from "../types";
 import { DocumentRange } from "../../types";
-import { parseIngredientItem, parseMethodStep } from "./core";
+import { parseIngredientItem, parseMethodStep, toPastTense } from "./core";
 import { ParseError } from "../../worker-errors";
 import { isSyntaxError, SyntaxError } from "../constants";
 
@@ -193,10 +193,14 @@ const processMethodSegment = (
 
     case "LOOP-CLOSE": {
       // Validate match with innermost loop
-      const loop = loopStack.pop()!;
-      if (loop.verb !== op.verb)
+      const loop = loopStack.pop();
+      if (!loop) {
+        throw new SyntaxError("No loop opener found");
+      }
+      const past = toPastTense(loop.verb);
+      if (past !== op.verb)
         throw new SyntaxError(
-          `Loop verb mismatch: expected '${loop.verb}', found '${op.verb}'`
+          `Loop verb mismatch: expected '${past}', found '${op.verb}'`
         );
 
       op.opener = loop.opener;
diff --git a/languages/chef/tests/parser-core.test.ts b/languages/chef/tests/parser-core.test.ts
index 8b28cb0..ea34259 100644
--- a/languages/chef/tests/parser-core.test.ts
+++ b/languages/chef/tests/parser-core.test.ts
@@ -355,14 +355,14 @@ describe("Parsing method instructions", () => {
   });
 
   test("`Verb` [the `ingredient`] until `verbed`", () => {
-    testMethodOp("Destroy until bake", {
+    testMethodOp("Destroy until baked", {
       code: "LOOP-CLOSE",
-      verb: "bake",
+      verb: "baked",
       opener: JumpAddressPlaceholder,
     });
-    testMethodOp("Destroy the tomato ketchup until bake", {
+    testMethodOp("Destroy the tomato ketchup until baked", {
       code: "LOOP-CLOSE",
-      verb: "bake",
+      verb: "baked",
       ing: "tomato ketchup",
       opener: JumpAddressPlaceholder,
     });
diff --git a/languages/chef/tests/samples/fibonacci-fromage.txt b/languages/chef/tests/samples/fibonacci-fromage.txt
index 68689d4..4a4a2df 100644
--- a/languages/chef/tests/samples/fibonacci-fromage.txt
+++ b/languages/chef/tests/samples/fibonacci-fromage.txt
@@ -18,14 +18,14 @@ Fold numbers into 2nd mixing bowl.
 Put numbers into 2nd mixing bowl.
 Calculate the numbers.
 Serve with salt and pepper.
-Ponder the numbers until calculate.
+Ponder the numbers until calculated.
 Add cheese to 2nd mixing bowl.
 Add cheese to 2nd mixing bowl.
 Fold numbers into 2nd mixing bowl.
 Move the numbers.
 Fold cheese into mixing bowl.
 Put cheese into 2nd mixing bowl.
-Transfer the numbers until move.
+Transfer the numbers until moved.
 Pour contents of the 2nd mixing bowl into the baking dish.
 
 Serves 1.
diff --git a/languages/chef/tests/samples/hello-world-cake.txt b/languages/chef/tests/samples/hello-world-cake.txt
index 4634d8d..04aa4b6 100644
--- a/languages/chef/tests/samples/hello-world-cake.txt
+++ b/languages/chef/tests/samples/hello-world-cake.txt
@@ -38,7 +38,7 @@ Stir the mixing bowl for 4 minutes.
 Liquefy the contents of the mixing bowl.
 Pour contents of the mixing bowl into the baking dish.
 bake the cake mixture.
-Wait until bake.
+Wait until baked.
 Serve with chocolate sauce.
 
 chocolate sauce.
@@ -56,7 +56,7 @@ Put sugar into the mixing bowl.
 Put hot water into the mixing bowl.
 Put heated double cream into the mixing bowl.
 dissolve the sugar.
-agitate the sugar until dissolve.
+agitate the sugar until dissolved.
 Liquefy the dark chocolate.
 Put dark chocolate into the mixing bowl.
 Liquefy the milk chocolate.