Question

i ___ swim when i was young. (modals)​

Answer 1

Answer:

I used to swim when I was young.

Answer 2

I used to swim when I was young

Explanation:

This question is related to English. Here we are asked to use modals to fill the gap in the questions. The question goes like that the person did swimming when he was young. It is known that the most common modal in grammar is "used to". By looking at the tone of the question and understanding its need we are adding the modal "used to" so as to fill the gap in the question. After adding the modal "used to", we get the answer as "I used to swim when I was young".