объясните когда пишется do, did done а когда was/were

1. Do, did, done - три формы глагола to do - делать. Do используется в Present Indefinite, did в Past Indefinite, done в Perfect Tense.

2. Was, were - формы глагола to be - быть, находиться в прошедшем времени. Was используется для I, he, she, it, were для you, we, they.

Examples: I do my homework every day. He did this work himself. We have already done this work.

                I was born in 1995. They were at the cinema yesterday.