要构成否定句的话，需要把"be"动词，情态动词，have，has，或者got改为其否定形式，通常对应的否定形式是在助动词后面加上not。下面是一些例子：
Be动词的否定形式:
- 原句：She is happy.
- 否定句：She is not happy.
情态动词的否定形式:
- 原句：He can swim.
- 否定句：He cannot swim. 或 He can't swim.
Have/Has的否定形式:
- 原句：She has a car.
- 否定句：She does not have a car. 或 She doesn't have a car.
Got的否定形式:
- 原句：They have got the information.
- 否定句：They have not got the information. 或 They haven't got the information.
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