Question

1. He does a volunteer work once a week.
2. He does volunteer work once a week.
3. He does the volunteer work once a week.
4. He does two volunteer works every week.
5. He does some volunteer work every week.
6. He does some volunteer works every week.

(Are they all grammatical? Can we use 'a' before 'volunteer work'?)

Answer 1

The correct sentences are 1 and 5.

Answer 2

You could say 2, 3, and 5.

Answer 3

Thanks, Jen. I meant 2 and 5. And you're right about 3.

1. is not correct.

Answer 4

You're welcome. :)