помогите пожалуйста по англ. яз. составить негативные предложения

Если по заданию, как в учебнике, в Past Continuous, то так: 
1. I was not studying last night.
2. My parents were not working last Saturday.
3. It was not raining yesterday.
4. We were not doing an exam at nine o'clock.
5. I was not waiting for you.
6. We were not speaking English.