diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index f7ab2d7e67a14163fcf325574314901cf802c70f..9daa71a5a5b58f840231adc0afecc6d749c61c66 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -713,7 +713,7 @@ function drupal_settings_initialize() {
  *
  * This function plays a key role in allowing Drupal's resources (modules
  * and themes) to be located in different places depending on a site's
- * configuration. For example, a module 'foo' may legally be be located
+ * configuration. For example, a module 'foo' may legally be located
  * in any of these three places:
  *
  * core/modules/foo/foo.module
@@ -724,7 +724,7 @@ function drupal_settings_initialize() {
  * the above, depending on where the module is located.
  *
  * @param $type
- *   The type of the item (i.e. theme, theme_engine, module, profile).
+ *   The type of the item (theme, theme_engine, module, profile).
  * @param $name
  *   The name of the item for which the filename is requested.
  * @param $filename
diff --git a/core/lib/Drupal/Core/Cache/CacheCollector.php b/core/lib/Drupal/Core/Cache/CacheCollector.php
index afc69229b2b86c4f092d791060942f59a131a5cb..21d54878ff334edd78a1852955d30d3c8c1c361f 100644
--- a/core/lib/Drupal/Core/Cache/CacheCollector.php
+++ b/core/lib/Drupal/Core/Cache/CacheCollector.php
@@ -176,11 +176,11 @@ public function delete($key) {
    * Flags an offset value to be written to the persistent cache.
    *
    * @param string $key
-   *   The key that was request.
+   *   The key that was requested.
    * @param bool $persist
    *   (optional) Whether the offset should be persisted or not, defaults to
    *   TRUE. When called with $persist = FALSE the offset will be unflagged so
-   *   that it will not written at the end of the request.
+   *   that it will not be written at the end of the request.
    */
   protected function persist($key, $persist = TRUE) {
     $this->keysToPersist[$key] = $persist;
diff --git a/core/lib/Drupal/Core/Utility/CacheArray.php b/core/lib/Drupal/Core/Utility/CacheArray.php
index 1b8464a438883ecc296041a8a526ee08245ffc67..974875301e45d11f1c4c898338faf2223c41d076 100644
--- a/core/lib/Drupal/Core/Utility/CacheArray.php
+++ b/core/lib/Drupal/Core/Utility/CacheArray.php
@@ -165,11 +165,11 @@ public function offsetUnset($offset) {
    * without necessarily writing back to the persistent cache at the end.
    *
    * @param $offset
-   *   The array offset that was request.
+   *   The array offset that was requested.
    * @param $persist
    *   Optional boolean to specify whether the offset should be persisted or
    *   not, defaults to TRUE. When called with $persist = FALSE the offset will
-   *   be unflagged so that it will not written at the end of the request.
+   *   be unflagged so that it will not be written at the end of the request.
    */
   protected function persist($offset, $persist = TRUE) {
     $this->keysToPersist[$offset] = $persist;