Key examples to be memorized:
| He took an excellent mark. Did he take an excellent mark? He did not take anexcellent mark. |
Illustrative Examples
They missed a lecture yesterday .
Did they miss a lecture yesterday?
Yes, they did. No, they didn’t.
They didn’t miss a lecture yesterday.
When did they miss a lecture?
They missed a lecture yesterday .
Who missed the lecture yesterday?
They did.