解释的比较多,希望楼主能细心看完,欢迎交流。我们讲一个句子如果包含主句和从句,那么两个句子的谓语部分的时态一定是要一致的。比如 He is a goog boy. 如果加上He said 作为主句,那么整个句子就变成了:He said that he was a good boy.但是也有一种情况是不想要变化的,原句是:他原来是个好孩子:He was a good boy.加上 He think he was a good boy的意思是他认为他过去是个好孩子。不需要变化的原因是:他过去是个好孩子是个事实,不管是他现在想还是未来想,都是事实,而且只是过去是,所以原句的过去时态可以不变化。楼主问的这句话针对的是另外一种情况是:从句的时态需...
主句是一般现在时,从句的时态不受限制,根据从句需要选用任何时态从句可以用过去时,一般现在时,将来时,完成时,过去进行时, 等时态 I don't know when Tom will come.一般将来时 I don't knowwhere Tom lives.一般现在时 I don't know what Tom did l...
举几个例子吧I know you had a fever last week.(过去)I know you have a good friend. (现在或事实)I know you will fly to Beijing next month. (将来)说白了,就是站在现在的时间点(主句),讲述过去、现在、或将来的事情(从句),都属于一...
最好的理解环境是 直接引语变间接引语直接引语变成间接引语时,如果直接引语的动词是过去时,间接引语中的动词要倒推一个时态,即:现在改成过去,过去改成过去完成,过去完成不变(靠墙了) He asked,"What are you doing?"He asked what i was diong. He asked,"Did you sleep...
就是从句的非谓语动词时态不用变化的意思,例如,i know (that)he will go to beijing tomorrow.这里谓语是一般现在时,从句里面那个非谓语动词不需要是一般现在时,这里是将来时,又如,i know that he went to beijing lastyear.这里又是一般过去式。...