1.1. He / used / wear / uniforms / when / he / be / school.

⇒⇒ He used to wear uniforms when he was at school.

2.2. I / not / meet / parents / since last Sunday.

⇒⇒ I haven't met my parents since last Sunday.

3. They / say / they / be / back / following day.

⇒⇒ They said they were back in the following day.

4. She / wish / she / have / new computer / next school year.

⇒⇒ She wishes she had a new computer in the next school year.

5. I / meet / Lan, / mother / be / kind to everyone.

⇒⇒ I met Lan, whose mother is very kind to everyone.