diff --git a/12_Day_Regular_expressions/12_day_regular_expressions.md b/12_Day_Regular_expressions/12_day_regular_expressions.md
index ef838821f..272e1478e 100644
--- a/12_Day_Regular_expressions/12_day_regular_expressions.md
+++ b/12_Day_Regular_expressions/12_day_regular_expressions.md
@@ -168,7 +168,7 @@ console.log(result)
 *replace()*: Executes a search for a match in a string, and replaces the matched substring with a replacement substring.
 
 ```js
-const txt = 'Python is the most beautiful language that a human begin has ever created.\
+const txt = 'Python is the most beautiful language that a human being has ever created.\
 I recommend python for a first programming language'
 
 matchReplaced = txt.replace(/Python|python/, 'JavaScript')
@@ -176,11 +176,11 @@ console.log(matchReplaced)
 ```
 
 ```sh
-JavaScript is the most beautiful language that a human begin has ever created.I recommend python for a first programming language
+JavaScript is the most beautiful language that a human being has ever created.I recommend python for a first programming language
 ```
 
 ```js
-const txt = 'Python is the most beautiful language that a human begin has ever created.\
+const txt = 'Python is the most beautiful language that a human being has ever created.\
 I recommend python for a first programming language'
 
 matchReplaced = txt.replace(/Python|python/g, 'JavaScript')
@@ -188,11 +188,11 @@ console.log(matchReplaced)
 ```
 
 ```sh
-JavaScript is the most beautiful language that a human begin has ever created.I recommend JavaScript for a first programming language
+JavaScript is the most beautiful language that a human being has ever created.I recommend JavaScript for a first programming language
 ```
 
 ```js
-const txt = 'Python is the most beautiful language that a human begin has ever created.\
+const txt = 'Python is the most beautiful language that a human being has ever created.\
 I recommend python for a first programming language'
 
 matchReplaced = txt.replace(/Python/gi, 'JavaScript')
@@ -200,7 +200,7 @@ console.log(matchReplaced)
 ```
 
 ```sh
-JavaScript is the most beautiful language that a human begin has ever created.I recommend JavaScript for a first programming language
+JavaScript is the most beautiful language that a human being has ever created.I recommend JavaScript for a first programming language
 ```
 
 ```js