1. Jake bought a nice blue jacket last month.
Did Jake buy a nice blue jacket last month? Yes, he did./ No, he didn't.
Jake didn't buy a nice blue jacket last month.
2. The boys came to school at 9 o'clock yesterday.
Do the boys come to school at 9 o'clock yesterday? Yes, they did./ No, they didn't.
The boys didn't come to school at 9 o'clock yesterday.
3. I went to the seaside last summer.
Did I go to the seaside last summer? Yes, I did./ No, I didn't.
I didn't go to the seaside last summer.
4. We bought a new TV-set last week.
Did we buy a new TV-set last week? Yes, we did./ No, we didn't.
We didn't buy a new TV-set last week.