diff --git a/docs/guide-zh-CN/structure-extensions.md b/docs/guide-zh-CN/structure-extensions.md
index 54d924a533..8e22b74bf2 100644
--- a/docs/guide-zh-CN/structure-extensions.md
+++ b/docs/guide-zh-CN/structure-extensions.md
@@ -363,7 +363,7 @@ If it is the first time you release an extension, you should register it on a Co
 on the VCS repository of your extension and notify the Composer repository about the new release. People will
 then be able to find the new release, and install or update the extension through the Composer repository.
 
-In the releases of your extension, besides code files you should also consider including the followings to
+In the releases of your extension, besides code files you should also consider including the following to
 help other people learn about and use your extension:
 
 * A readme file in the package root directory: it describes what your extension does and how to install and use it.
diff --git a/docs/guide/caching-data.md b/docs/guide/caching-data.md
index 621013e177..f4177d7d51 100644
--- a/docs/guide/caching-data.md
+++ b/docs/guide/caching-data.md
@@ -135,7 +135,7 @@ which may reduce the overhead involved in retrieving cached data. The APIs [[yii
 and [[yii\caching\Cache::madd()|madd()]] are provided to exploit this feature. In case the underlying cache storage
 does not support this feature, it will be simulated.
 
-Because [[yii\caching\Cache]] implements `ArrayAccess`, a cache component can be used like an array. The followings
+Because [[yii\caching\Cache]] implements `ArrayAccess`, a cache component can be used like an array. The following
 are some examples:
 
 ```php
diff --git a/docs/guide/concept-di-container.md b/docs/guide/concept-di-container.md
index 9fdb9d5c9b..804ca4406a 100644
--- a/docs/guide/concept-di-container.md
+++ b/docs/guide/concept-di-container.md
@@ -344,7 +344,7 @@ When to Register Dependencies <span id="when-to-register-dependencies"></span>
 -----------------------------
 
 Because dependencies are needed when new objects are being created, their registration should be done
-as early as possible. The followings are the recommended practices:
+as early as possible. The following are the recommended practices:
 
 * If you are the developer of an application, you can register dependencies in your
   application's [entry script](structure-entry-scripts.md) or in a script that is included by the entry script.
diff --git a/docs/guide/db-query-builder.md b/docs/guide/db-query-builder.md
index c94b8648e4..1ee3ddfc1c 100644
--- a/docs/guide/db-query-builder.md
+++ b/docs/guide/db-query-builder.md
@@ -225,7 +225,7 @@ Operator format allows you to specify arbitrary conditions in a programmatic way
 ```
 
 where the operands can each be specified in string format, hash format or operator format recursively, while
-the operator can be one of the followings:
+the operator 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,
diff --git a/docs/guide/runtime-handling-errors.md b/docs/guide/runtime-handling-errors.md
index 3dc78bf612..478178fb62 100644
--- a/docs/guide/runtime-handling-errors.md
+++ b/docs/guide/runtime-handling-errors.md
@@ -2,7 +2,7 @@ Handling Errors
 ===============
 
 Yii includes a built-in [[yii\web\ErrorHandler|error handler]] which makes error handling a much more pleasant
-experience than before. In particular, the Yii error handler does the followings to improve error handling:
+experience than before. In particular, the Yii error handler does the following to improve error handling:
 
 * All non-fatal PHP errors (e.g. warnings, notices) are converted into catchable exceptions.
 * Exceptions and fatal PHP errors are displayed with detailed call stack information and source code lines
diff --git a/docs/guide/security-authorization.md b/docs/guide/security-authorization.md
index 24b79f1e8a..65b1ca8c3c 100644
--- a/docs/guide/security-authorization.md
+++ b/docs/guide/security-authorization.md
@@ -60,7 +60,7 @@ When ACF performs authorization check, it will examine the rules one by one from
 a match. The `allow` value of the matching rule will then be used to judge if the user is authorized. If none
 of the rules matches, it means the user is NOT authorized and ACF will stop further action execution.
 
-By default, ACF does only of the followings when it determines a user is not authorized to access the current action:
+By default, ACF does only the following when it determines a user is not authorized to access the current action:
 
 * If the user is a guest, it will call [[yii\web\User::loginRequired()]], which may redirect the browser to the login page.
 * If the user is already authenticated, it will throw a [[yii\web\ForbiddenHttpException]].
diff --git a/docs/guide/structure-controllers.md b/docs/guide/structure-controllers.md
index 9644c408b6..109cd1be40 100644
--- a/docs/guide/structure-controllers.md
+++ b/docs/guide/structure-controllers.md
@@ -131,7 +131,7 @@ Controller class names can be derived from controller IDs according to the follo
 * Append the suffix `Controller`.
 * And prepend the [[yii\base\Application::controllerNamespace|controller namespace]].
 
-The followings are some examples, assuming the [[yii\base\Application::controllerNamespace|controller namespace]]
+The following are some examples, assuming the [[yii\base\Application::controllerNamespace|controller namespace]]
 takes the default value `app\controllers`:
 
 * `article` derives `app\controllers\ArticleController`;
diff --git a/framework/base/Behavior.php b/framework/base/Behavior.php
index 5750586be8..a55afafc90 100644
--- a/framework/base/Behavior.php
+++ b/framework/base/Behavior.php
@@ -36,7 +36,7 @@ class Behavior extends Object
      * attached to the owner; and they will be detached from the events when
      * the behavior is detached from the component.
      *
-     * The callbacks can be any of the followings:
+     * The callbacks can be any of the following:
      *
      * - method in this behavior: `'handleClick'`, equivalent to `[$this, 'handleClick']`
      * - object method: `[$object, 'handleClick']`
diff --git a/framework/base/Component.php b/framework/base/Component.php
index 3039fa6e8b..803a112eec 100644
--- a/framework/base/Component.php
+++ b/framework/base/Component.php
@@ -447,7 +447,7 @@ class Component extends Object
     /**
      * Attaches an event handler to an event.
      *
-     * The event handler must be a valid PHP callback. The followings are
+     * The event handler must be a valid PHP callback. The following are
      * some examples:
      *
      * ~~~
diff --git a/framework/base/Module.php b/framework/base/Module.php
index cdabcef8c9..72eece53f4 100644
--- a/framework/base/Module.php
+++ b/framework/base/Module.php
@@ -364,7 +364,7 @@ class Module extends ServiceLocator
      * Adds a sub-module to this module.
      * @param string $id module ID
      * @param Module|array|null $module the sub-module to be added to this module. This can
-     * be one of the followings:
+     * be one of the following:
      *
      * - a [[Module]] object
      * - a configuration array: when [[getModule()]] is called initially, the array
diff --git a/framework/db/ActiveQueryInterface.php b/framework/db/ActiveQueryInterface.php
index 6b0af915e2..7f38a0f789 100644
--- a/framework/db/ActiveQueryInterface.php
+++ b/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
diff --git a/framework/db/ActiveQueryTrait.php b/framework/db/ActiveQueryTrait.php
index e0fc17d9cb..0b66d285a5 100644
--- a/framework/db/ActiveQueryTrait.php
+++ b/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
diff --git a/framework/db/QueryInterface.php b/framework/db/QueryInterface.php
index b7cf82ddf9..1cd26ba345 100644
--- a/framework/db/QueryInterface.php
+++ b/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,
diff --git a/framework/db/Schema.php b/framework/db/Schema.php
index d99bf8a2fe..4de84bbc90 100644
--- a/framework/db/Schema.php
+++ b/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';
diff --git a/framework/di/Container.php b/framework/di/Container.php
index a7fbdd0677..6273f6d355 100644
--- a/framework/di/Container.php
+++ b/framework/di/Container.php
@@ -230,7 +230,7 @@ class Container extends Component
      * You may use [[has()]] to check if a class definition already exists.
      *
      * @param string $class class name, interface name or alias name
-     * @param mixed $definition the definition associated with `$class`. It can be one of the followings:
+     * @param mixed $definition the definition associated with `$class`. It can be one of the following:
      *
      * - a PHP callable: The callable will be executed when [[get()]] is invoked. The signature of the callable
      *   should be `function ($container, $params, $config)`, where `$params` stands for the list of constructor
diff --git a/framework/di/ServiceLocator.php b/framework/di/ServiceLocator.php
index 23d89cb331..f4c28df875 100644
--- a/framework/di/ServiceLocator.php
+++ b/framework/di/ServiceLocator.php
@@ -170,7 +170,7 @@ class ServiceLocator extends Component
      *
      * @param string $id component ID (e.g. `db`).
      * @param mixed $definition the component definition to be registered with this locator.
-     * It can be one of the followings:
+     * It can be one of the following:
      *
      * - a class name
      * - a configuration array: the array contains name-value pairs that will be used to
diff --git a/framework/rbac/DbManager.php b/framework/rbac/DbManager.php
index 7887f08512..5df9e7cd04 100644
--- a/framework/rbac/DbManager.php
+++ b/framework/rbac/DbManager.php
@@ -60,7 +60,7 @@ class DbManager extends BaseManager
      */
     public $ruleTable = '{{%auth_rule}}';
     /**
-     * @var Cache|array|string the cache used to improve RBAC performance. This can be one of the followings:
+     * @var Cache|array|string the cache used to improve RBAC performance. This can be one of the following:
      *
      * - an application component ID (e.g. `cache`)
      * - a configuration array
diff --git a/framework/validators/ExistValidator.php b/framework/validators/ExistValidator.php
index 2657391477..bc6e7a5095 100644
--- a/framework/validators/ExistValidator.php
+++ b/framework/validators/ExistValidator.php
@@ -19,7 +19,7 @@ use yii\base\InvalidConfigException;
  * This validator is often used to verify that a foreign key contains a value
  * that can be found in the foreign table.
  *
- * The followings are examples of validation rules using this validator:
+ * The following are examples of validation rules using this validator:
  *
  * ```php
  * // a1 needs to exist
diff --git a/framework/validators/UniqueValidator.php b/framework/validators/UniqueValidator.php
index eb90494a9e..4612405a16 100644
--- a/framework/validators/UniqueValidator.php
+++ b/framework/validators/UniqueValidator.php
@@ -16,7 +16,7 @@ use yii\db\ActiveRecordInterface;
  * UniqueValidator checks if the value being validated is unique in the table column specified by
  * the ActiveRecord class [[targetClass]] and the attribute [[targetAttribute]].
  *
- * The followings are examples of validation rules using this validator:
+ * The following are examples of validation rules using this validator:
  *
  * ```php
  * // a1 needs to be unique