Question

He was/were a policeman. We was/were very happy.Was/were you happy?They wasn't/weren't interested in.I was/were at school.

Answer 1

1. was

2. were

3. were

4.weren't

5.was

Answer 2

Was
were
Were
wasn't
was

Answer 3

The correct forms of "was" and "were" in the given sentences are as follows:

1. He was a policeman. (singular subject "He" requires "was")
2. We were very happy. (plural subject "We" requires "were")
3. Were you happy? (the question form of "you were" uses "were")
4. They weren't interested. ("They" is plural, so "were not" becomes "weren't")
5. I was at school. (singular subject "I" requires "was")

Remember that "was" is used with singular subjects (e.g., he, she, it, and singular nouns), and "were" is used with plural subjects (e.g., we, they, you, and plural nouns).