diff --git a/ql/src/semmle/go/Concepts.qll b/ql/src/semmle/go/Concepts.qll
index b43d75cf8cb..e17b5f3889a 100644
--- a/ql/src/semmle/go/Concepts.qll
+++ b/ql/src/semmle/go/Concepts.qll
@@ -11,7 +11,7 @@ import semmle.go.dataflow.FunctionInputsAndOutputs
  * A data-flow node that executes an operating system command,
  * for instance by spawning a new process.
  *
- * Extends this class to refine existing API models. If you want to model new APIs,
+ * Extend this class to refine existing API models. If you want to model new APIs,
  * extend `SystemCommandExecution::Range` instead.
  */
 class SystemCommandExecution extends DataFlow::Node {
diff --git a/ql/src/semmle/go/StringOps.qll b/ql/src/semmle/go/StringOps.qll
index 8fdc4223716..dfc8ceb3c9f 100644
--- a/ql/src/semmle/go/StringOps.qll
+++ b/ql/src/semmle/go/StringOps.qll
@@ -9,7 +9,7 @@ module StringOps {
   /**
    * An expression that is equivalent to `strings.HasPrefix(A, B)` or `!strings.HasPrefix(A, B)`.
    *
-   * Extends this class to refine existing API models. If you want to model new APIs,
+   * Extend this class to refine existing API models. If you want to model new APIs,
    * extend `StringOps::HasPrefix::Range` instead.
    */
   class HasPrefix extends DataFlow::Node {
@@ -43,7 +43,7 @@ module StringOps {
     /**
      * An expression that is equivalent to `strings.HasPrefix(A, B)` or `!strings.HasPrefix(A, B)`.
      *
-     * Extends this class to model new APIs. If you want to refine existing API models, extend
+     * Extend this class to model new APIs. If you want to refine existing API models, extend
      * `StringOps::HasPrefix` instead.
      */
     abstract class Range extends DataFlow::Node {
diff --git a/ql/src/semmle/go/frameworks/SQL.qll b/ql/src/semmle/go/frameworks/SQL.qll
index 49f61a74452..a0b22c0cada 100644
--- a/ql/src/semmle/go/frameworks/SQL.qll
+++ b/ql/src/semmle/go/frameworks/SQL.qll
@@ -9,7 +9,7 @@ module SQL {
   /**
    * A data-flow node whose string value is interpreted as (part of) a SQL query.
    *
-   * Extends this class to refine existing API models. If you want to model new APIs,
+   * Extend this class to refine existing API models. If you want to model new APIs,
    * extend `SQL::QueryString::Range` instead.
    */
   class QueryString extends DataFlow::Node {