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know sB Do

应该是一个不规范的用法,按照英语编译的通用语法,know是一个及物词,后面必须跟上宾语如 know sth、 know sb、know 宾语从句等.但是在口语中为了简洁,会经常省略宾语,如 I know,表示 我明白,我知道的意思.你提的这个用法应该是不规范的用法,与通用语法不符合,所以为了咱们的考试,还是使用通用语法吧!!

没有我知道他在干什么 I know he is doing sth 我知道他干过什么 …………我知道他想干什么 …………

know为完成时或过去时时,作宾补的不定式(为行为动词时)to可省.如 i have know her (to) lie 但是在被动结构中to不可省,如 she has been known to lie 另外根据语义需要,会出现know sb doing sth 的情况

如果想表达“我知道你在干嘛”一般用I know you are doing (know +从句)

其实 "have known somebody do something" 的语法本身就是错的应该是 "have to know somebody to do something"意思是 了解某人会做某事

know about sb、know of sb、know sb的区别为:意思不同、用法不同、侧重点不同.一、意思不同1.know about sb意思:了解某人.2.know of sb意思:听说过某人.3.know sb意思:认识某人.二、用法不同1.know about sb用法:基本意思是

how sb.do是名词性从句如果从句中的主语 和主句的主语一致的情况下可以用带疑问词的不定式how to do代替how sb.do如i don't know how i shall do it.=i don't know how to do it.本句一般应该用后者而i don't know how he will do it则不能用i don't know how to do it代替

know about sb/sth 了解;know sb/sth 认识如 I know him but I don't know about him. 我认识他但我不了解他.加油!不明白再问!如果帮到你,请采纳,谢谢!

know +sb/sth或者know+that从句,know后面一般不接不定式或者分词作宾语,一般都是接that从句,that可省略.

很了解某人

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