什么时候在“be”动词后面加“not”?

Question

如题所述

Answer 1

如果句子里面有动词,表达一种动作,跑啊,跳啊之类的，可以加“not”。

句中含有动词可以加“not”

比如

do not run / do not jump / do not drink water / do not have apples

be动词三种时态缩写

1.一般现在时态

am not =>无缩写形式

is not => 缩写 isn't

are not => 缩写aren't

2.过去时态

was not => 缩写 wasn't

were not => 缩写weren't

3.完成时态

not been =>无缩写形式

说明：完成时态时使用have not been的形式，not在be动词前面。

例句：

1.He has not yet learned how to be gracious in defeat.

他还没有学会怎样豁达大度地面对失败。

2.They are not to be mentioned in the same breath.

他们不可同日而语.

Answer 2

当be动词后面是实意动词（如：跑，跳等有实际意义的动词）可以直接not否定，

如：He is riding a bike.--He isn't(is not)riding a bike.

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