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注意:表示数量、时间、距离、金钱等的复数名词作主语时,谓语动词一般用单数形式。用于数学运算的数字作主语,谓语通常也用单数形式。如:

Ten pounds is enough.

Two hours is a long time.

2、陈述句的否定形式

(1)带有系动词、助动词、情态动词的肯定句,只要把not, never加在这些动词后面,就能把肯定句变为否定,no通常否定名词或动名词

I’m not a doctor.

I haven’t got a camera.

I have never met him before.

(2)若谓语是行为动词,前面又没有助动词和情态动词,只要在谓语动词之前加助动词do( does, did ) not就行。

I didn’t go to the concert yesterday.

He doesn’t speak English

(3)no修饰复数名词作主语,谓语动词要用复数。如果no修饰单数名词作主语,谓语动词要用单数。如:

No men are admitted

No man is admitted.

(4)表示部分否定的词有:not all, not everything, not everybody, not everywhere, not both, not always.

Not everybody enjoys fishing.

Not everything goes well.

【句子的类型(二)】

句子的类型:疑问句

疑问句是用来提出疑问的句子,疑问句末尾用问号“?”。疑问句一般分为:一般疑问句;特殊疑问句;选择疑问句和反意疑问句。

1、一般疑问句

(1) 含有系动词、助动词、情态动词的陈述句改为疑问句:要把这些动词提到主语的前面,句末用问号。

Are you a policeman?

Must I go now?

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