Grammar fix: followings -> following

framework/db/ActiveQueryInterface.php

@@ -59,7 +59,7 @@ interface ActiveQueryInterface extends QueryInterface
      * For example, `orders.address` means the `address` relation defined
      * in the model class corresponding to the `orders` relation.
      *
-     * The followings are some usage examples:
+     * The following are some usage examples:
      *
      * ~~~
      * // find customers together with their orders and country

framework/db/ActiveQueryTrait.php

@@ -53,7 +53,7 @@ trait ActiveQueryTrait
      * For example, `orders.address` means the `address` relation defined
      * in the model class corresponding to the `orders` relation.
      *
-     * The followings are some usage examples:
+     * The following are some usage examples:
      *
      * ~~~
      * // find customers together with their orders and country

framework/db/QueryInterface.php

@@ -91,7 +91,7 @@ interface QueryInterface
      * - `['status' => null]` generates `status IS NULL`.
      *
      * A condition in operator format generates the SQL expression according to the specified operator, which
-     * can be one of the followings:
+     * can be one of the following:
      *
      * - **and**: the operands should be concatenated together using `AND`. For example,
      *   `['and', 'id=1', 'id=2']` will generate `id=1 AND id=2`. If an operand is an array,

framework/db/Schema.php

@@ -36,7 +36,7 @@ use yii\caching\TagDependency;
 abstract class Schema extends Object
 {
     /**
-     * The followings are the supported abstract column data types.
+     * The following are the supported abstract column data types.
      */
     const TYPE_PK = 'pk';
     const TYPE_BIGPK = 'bigpk';