Have not意思

"Have not" is a contraction that is used in English to combine the auxiliary verb "have" with the negative particle "not." It is used to form the negative of the present perfect tense. Here are some examples of how "have not" is used in sentences:

1. I have not seen that movie yet.
2. They have not made a decision yet.
3. She has not finished her homework.
4. We have not received any news from them.
5. He has not eaten anything all day.

In each of these examples, "have not" is used to indicate that an action or situation has not happened or is not present.