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know有了解;知道;认识等意思，那么你知道know的过去式是什么吗?下面跟着小编一起来学习一下，希望对大家的学习有所帮助!
know的各种时态：过去分词: known
过去式: knew
现在分词: knowing
know的用法：know的用法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。
know的用法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。
know的用法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。
know的用法4：know是表示思想状态的动词,指思维活动的结果,通常不用于进行体。
know的过去式例句：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。
11. It turned out that I knew the person who got shot.
结果发现我认识那个中枪的人。
12. He knew full well he'd be ashamed of himself later.
他很清楚地知道自己过后会无地自容。
13. Asked what English he knew, Mr Semko rattled off "One, two, three"
问他懂哪些英文词，塞姆科先生不假思索地回答：“一，二，三。”
14. He knew the nomination was his for the asking.
他知道只要他开口就能得到那项提名。
15. We all knew by then that the affair was practically over.
到那时，我们都知道事情实际上已经结束了。
