Question

using a red pen, put in the commas so the sentences make sense:
a the lady put her seat belt on a little bit annoyed with her son.
b the children sat down in their chairs silently watching their teacher.
c quickly take the plate from that child.
d he rolled on to the mat his legs tucked under him and his hands stretched out.
e if you cant stop complaining go to your room.

Explanation:

Analyze introductory clauses and phrases

We identify sentences starting with introductory words or dependent clauses.

• Sentence (c) starts with the introductory adverb "Quickly".
• Sentence (e) starts with the conditional dependent clause "If you can't stop complaining".

We place commas after these introductory elements to separate them from the main independent clause.

Identify parenthetical and non-essential elements

We look for descriptive phrases that add extra information but are not essential to the main clause.

• In sentence (a), "a little bit annoyed with her son" describes the lady's state of mind and acts as a parenthetical modifier.
• In sentence (b), "silently watching their teacher" is a participial phrase describing the children.
• In sentence (d), "his legs tucked under him and his hands stretched out" is an absolute phrase describing his posture.

We use commas to set off these descriptive, non-essential elements to make the sentences clear.

Answer:

Question 1a

The lady put her seat belt on, a little bit annoyed with her son.

Question 1b

The children sat down in their chairs, silently watching their teacher.

Question 1c

Quickly, take the plate from that child.

Question 1d

He rolled on to the mat, his legs tucked under him and his hands stretched out.

Question 1e

If you can't stop complaining, go to your room.