Edit let-bindings.mdx

Author: JiaeK

pages/docs/manual/latest/let-binding.mdx

@@ -35,7 +35,7 @@ let message = {
   let part2 = "world"
   part1 ++ " " ++ part2
 }
-// `part1` and `part2` not accessible here!
+// `part1` and `part2` are not accessible here!
 ```
 ```js
 var message = "hello world";
@@ -72,7 +72,7 @@ Let bindings are "immutable", aka "cannot change". This helps our type system de
 
 ## Binding Shadowing
 
-The above restriction might sound unpractical at first. How would you change a value then? Usually, 2 ways:
+The above restriction might sound impractical at first. How would you change a value then? Usually, 2 ways:
 
 The first is to realize that many times, what you want isn't to mutate a variable's value. For example, this JavaScript pattern:
 
@@ -181,5 +181,5 @@ Still, `%%private` is useful in the following scenarios:
 
 - **Code generators.** Some code generators want to hide some values but it is sometimes very hard or time consuming for code generators to synthesize the types for public fields.
 
-- **Quick prototyping.** During prototyping, we still want to hide some values, but the interface file is not stable yet, `%%private` provide you such convenience.
+- **Quick prototyping.** During prototyping, we still want to hide some values, but the interface file is not stable yet, `%%private` provides you such convenience.