5 Rewrite the sentences in the negative form. My sister liked that new CD.
My sister didn't like that new CD.
1 They used a dictionary in class.
2 John stayed at Peter's house last night.
3 Maria visited her friend yesterday.
4 You changed school last year.
5 Einstein invented the computer.
1 didn't use
2 didn't stay
3 didn't visit
4 didn't change
5 didn't invent
6 didn't chat