know后跟什么 怎么用

know后跟什么 怎么用

洛基英语整理know的用法,希望对你有帮助：
1. 其后一般不直接跟不定式,但在以下情况可接不定式：
(1) 后接“疑问词（why 除外）+不定式”.如：
I didn’t know what to say. 我不知道说什么.
We don’t know when to start. 我们不知道什么时候出发.
他会弹钢琴.
误：He knows to play the piano.
正：He knows how to play the piano.
(2) 表示知道应该要做某事.如：
She knows not to tell anyone about it. 她知道不该告诉任何人.
比较下面两句,注意其中的how的有无和意思的变化：
Does he know to come here first? 他知道应该先到这儿来吗?
Does he know how to come here? 他知道如何到这儿来吗?
2. 比较 know 与 get [come] to know：前者意为“认识”,是持续性动词；后者意为“开始认识”,是终止性动词.如：
We’ve known each other for 10 years. 我们俩认识10年了.
We got to know each other ten years ago. 我们俩是10年前认识的.
3. know 之后可接不定式的复合结构,主要句型为：
(1) know+宾语+to be（to be通常不省略）,这类句型可转换为that引导的宾语从句.如：
I know him to be a fool.=I know (that) he is a fool. 我知道他是个傻瓜.
(2) know+宾语+to do（有时可省略 to）,在这类句型中 know 一般只限于用过去时或完成时,通常译为“听说过”“见过”等.如：
I have never known her (to) tell lies. 我从未听说她撒过谎.
I’ve never known her (to) be late before. 我以前从不知道她迟到过.
在被动语态中,不定式必须带 to.如：
He was known to have a quick temper as a boy. 人们都知道他在孩提时代脾气暴躁.
4. 比较：be known as, be known for 与 be known to：
(1) be known as 意为“作为……出名”.如：
She was well known as an excellent dancer. 她作为一个杰出的舞蹈家非常有名.
(2) be known for 意为“因为……出名”.如：
He is known for his poems. 他以他的诗出名.
(3) be known to 意为“为……所知”.如：
He is known to everyone. 大家都熟悉他.