If the answer to a question is 'no', you may omit the main verb.
Examples:
Question |
Answer |
Answer |
|
Informal, spoken language |
Emphatic spoken and formal language |
Will she come to the party tomorrow? |
No, she won't. |
No, she will not. |
Has Tom finished the report? |
No, he hasn't. |
No, he has not. |
Do you study Russian this semester? |
No, we don't. |
No, we do not. |