Question

I ... a tiger yesterday (see, saw

Answer 1

I saw a tiger yesterday

Answer 2

This blank can be filled with the word 'saw'

So, correct sentence will be:-

I saw a tiger yesterday.

Saw is the past form of see. This form is used when sentence is in past form.

We can detect whether the sentence is in present, past or future be looking the sentence structure.

Here yesterday is used so it reflects that this sentence is showing the past activity.

Hence, past form of verb will be used that is saw.