know的过去式是knew；过去分词是known。know的英式读法是[nəʊ]；美试读法是[noʊ]。作动词意思是了解；知道；认识。作名词意思是知情。
相关例句：
用作动词 (v.)
1、What do you know about us?
你对我们有什么了解?
2、I didn't know the truth until she told me what happened.
直到她告诉我发生的事,我才了解真相。
用作名词 (n.)
1、Somebody in the know told me he's going to resign.
有知情者告诉我他要辞职了。
2、A friend who is in the know says she already left the country.
一位知情的朋友说，她已经离开这个国家了。
扩展资料：
单词解析：
1、变形：
形容词: knowable
名词: knower
现在分词: knowing
第三人称单数: knows
2、用法：
v. (动词)
1）know的基本意思是“知道”“认识”“听说”,指直接了解某事物,也可表示“领会,懂得”,指通过体验或传授而获得知识。
2）know既可用作不及物动词，也可用作及物动词。用作及物动词作“知道，懂得”解时，可接表示事物的名词、代词、带疑问词的动词不定式、that或疑问词引导的从句作宾语，也可接以“(to be/as+) n./adj./prep. -phrase. ”或动词不定式充当补足语的复合宾语。
作“认识,了解”解时，可接表示人或物的名词作宾语。know可用于被动结构。know接to be作宾语补足语时，to be常可省略，但当to be表示的时间先于know表示的时间时，须用不定式的完成式,且不可省略。
3）在对话回答语中，如know的宾语表示的是整个事实(如that-clause)，则宾语可省略；如know的宾语是一个具体事物，则通常以it代替之。
参考资料：
百度百科-know
过去式： knew.
第三人称单数： knows.
现在分词： knowing.
过去分词： known.
英 [nəʊ] 美 [noʊ]。
v.知道，知悉，了解认识到，懂得，意识到普遍认为，皆知确信，确知，肯定熟悉，认识精通，熟悉（书、音乐或艺术等）熟知（过程或系统）懂，会说（某种语言）把……看作是，认为……是将……称为能认出能区分学会，掌握看到过，听到过亲身体验。
n.知识知晓，知情。
例句：
Do you know his address?
你知道他的地址吗？
The cause of the fire is not yet known.
火灾的原因尚不清楚。
All I know is that she used to work in a bank (= I have no other information about her) .
我只知道她曾在银行工作过。
I know (that) people's handwriting changes as they get older.
我知道人们的笔迹随着年龄的增长而变化。
It is widely known that CFCs can damage the ozone layer.
众所周知氯氟烃会破坏臭氧层。
I knew where he was hiding.
我知道他藏在哪里。
I didn't know what he was talking about.
我不知道他在谈什么。
我们都知道know就是知道的意思，那么你知道know的过去式是什么吗?下面是我为你整理的know的过去式 ，希望大家喜欢!
know的过去式过去式： knew
know的过去式 knew造句1. He knew what he wanted to do from the age of 14. 他14岁起就知道自己日后干什么了。
2. They had alienated the one man who knew the business. 他们弄僵了同那个唯一懂行的人之间的关系。
3. She laboured under the illusion that I knew what I was doing. 她有一个错觉，以为我知道自己在做什么。
4. The group proceeded with a march they knew would lead to bloodshed. 这个团体继续示威游行，他们知道这将导致流血事件的发生。
5. He knew when to leave well alone and when to interfere. 他知道什么时候该适可而止，什么时候该插手干预。
6. Once he knew his father's name, finding his whereabouts proved surprisingly easy. 一旦他知道了父亲的名字，查找他父亲的下落就变得出奇地容易。
7. He knew roughly what was about to be said. 他大概知道要说些什么。
8. No one knew how to treat this dreaded disease. 没人知道如何治疗这种可怕的疾病。
9. I actually knew her, but in overalls I passed unrecognised. 实际上我认识她，但是我身着工作服，与她擦身而过的时候却没被认出来。
10. He was a very mechanical person, who knew a lot about sound. 他精通机械，了解许多有关声音的知识。
know 的用法v.知道了解认识确信n.知情
1. I know it's nothing serious and I feel quite unemotional about it. 我知道那根本没什么大不了的，所以有些无动于衷。
2. We all know that fats spoil by becoming rancid. 我们都知道油脂变质后会发臭。
3. Kaspar had spoken know-ledgeably about the state of agriculture in Europe. 卡斯帕对欧洲农业状况发表了一番颇有见地的见解。
4. I know how to darn, and how to sew a button on. 我会打补丁，缝纽扣。
5. You have to know where to stand for a good viewpoint. 你得知道站在哪里观察角度比较理想。
6. I didn't know Ron had that much strength of character. 我当时不知道罗恩有那么坚强的个性。
7. "I know you," he said flatly, matter-of-fact, neutral in tone. “我认识你。”他平淡地说道，就事论事，不带任何感情。
8. We know some sex offenders dupe the psychologists who assess them. 我们知道有些性犯罪者会愚弄给他们做测评的心理学家。
9. How do we know you're not just covering up for your friend? 我们怎么知道你不只是在为自己的朋友遮掩呢?
10. I know you will join me in wishing them Godspeed. 我知道你会同我一起祝愿他们诸事顺遂的。
