Question

His father......him a watch. (gave , give, giving)

Answer 1

Gave

Clearly the sentence is in past tense and options given aren't suitable.

Answer 2

gave.

The event of giving a watch in the following sentence has already happened in the past.

Therefore, it is a past tense and with it one cannot use 'give' or 'giving' because these are not in the past tense.

The only remaining option here is 'gave', which we have to use for constructing a sentence that has some sense to it.

Therefore, 'gave' is the correct option in this case.