Punctuation Exercise (303)

Each of the following sentences contains more than one clause. Add commas as needed.

Answers and Explanations

1.
Original: He was talking on his cell phone while he was driving.
Correct : He was talking on his cell phone while he was driving.

No comma needed because the subordinate clause (while he was driving) follows the independent clause and provides essential information.

2.
Original: Because he wasn’t paying attention to what he was doing the forklift smashed through the wall.
Correct : Because he wasn’t paying attention to what he was doing, the forklift smashed through the wall.

A comma is needed because the subordinate clause (Because he wasn’t paying attention to what he was doing) precedes the independent clause.

3.
Original: The student decided to switch majors because she didn’t write English well enough to teach it.
Correct : The student decided to switch majors because she didn’t write English well enough to teach it.

No comma needed because the subordinate clause (because she didn’t write English well enough to teach it) follows the independent clause and provides essential information.

4.
Original: The athlete passed chemistry although he had not memorized the Periodic Table.
Correct : The athlete passed chemistry, although he had not memorized the Periodic Table.

A comma is appropriate here because the subordinate clause (although he had not memorized the Periodic Table) adds information to the main clause, but is not necessary to its meaning.

5.
Original: Although the palace is beautiful the gardens are even more pleasant to explore.
Correct : Although the palace is beautiful, the gardens are even more pleasant to explore.

A comma is needed because the subordinate clause (Although the palace is beautiful) precedes the independent clause.

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