IV. Сделайте следующие предложения вопросительными и отрицательными:
1. Our students worked on the farm in September.
2. He became an agronomist last year.
3. She studied economics at the Institute.
4. We began to speak English.
5. They came to Kazan yesterday.

1. Did our students work on the farm in september?

our students didn't work on the farm in september

2.Did he become an agronomist last year?

he didn't become an agronomist last year

3.Did she study economics at the institute?

she didn't study economics at the institute

4 Did we begin to speak english?

 we didn't begin to speak english

5.did they come to Kazan yesterday?

they didn't come to Kazan yesterday