【英语基础】Does的用法》》》

来源:百度知道 编辑:UC知道 时间:2024/06/11 22:14:40
What's the weather like in winter?
回答一It sometimes snow(s).
要加s吗?

回答二:It doesn't snow(s) in winter.
要加s吗?能不能用It's 代替It doesn't?为什么?

谢谢。

回答一:snows
回答二:不加s 不能用It's代替
因为这是表示客观事实和普遍真理、客观存在的,要用一般现在时
另外,一般现在时的用法:
1) 经常性或习惯性的动作,常与表示频度的时间状语连用。
时间状语:often, always, usually, sometimes ,every morning/night/evening/day/week ,twice a week ,never.
如:I read English every morning.
She sometimes goes shopping on Sundays.

2) 客观真理,客观存在,科学事实。如:The earth moves around the sun.
Shanghai lies in the east of China.

3) 表示格言或警句中。如:Pride goes before a fall. 骄者必败。

4) 现在时刻的状态、能力、性格、个性。如:I don't want so much.
He writes good English but does not speak well.

5)倒装句,表示动作正在进行,如:Here comes the bus. = The bus is coming.
There goes the bell. = The bell is ringing.

6) 一般现在时Be动词情况: am,is,are也可以做一般现在时的助动词
如:I am a student.

snow是实意动词 变否定或者疑问句的时候 用do的变形 does did等

It sometimes snows. 因为it是第三人称单数 要加s

It doesn't snow in winter. 没有S 因为does not已经否定 动词还原呈原型
并且 由于snow是实意动词 用do的相应形式

1