在时间状语从句中是否能用完成体?若主句是过去时态,时间状语从句中是否能用完成体?如Ididn'tknowhehadcomebackuntilImethiminthestreet.这句话是对的,若要表达意思,非要说直到我见过他以后

Question

在时间状语从句中是否能用完成体?
若主句是过去时态,时间状语从句中是否能用完成体?
如 I didn't know he had come back until I met him in the street.
这句话是对的,若要表达意思,非要说直到我见过他以后才知道（比如见了回家才知道）
是否可用 I didn't know he had come back until I have met him in the street.
或 I didn't know he had come back until I have met him twice in the street.
那,如after 呢,要说他进来了后,我才意识到···
是否能用,After he had come in ,only could I realize```
感觉平常课本上都在after从句中用的一般过去···
如 After he came in ,only could I realize```
当然这肯定对了,···可学英语是用来干嘛呢?,这学法果真有问题···

Answer 1

学英语用来干嘛,嗯..看你想干嘛了
你想做研究,那么学英语才能看得懂外文书籍,
学好了你可以当翻译；以后公司或单位工作,跟外国人打交道更是用得着外语
,很多很多了
学英语没必要那么跟语法死磕,像I didn't know he had come back until I met him in the street,这句话,你用完成时说出来,别人也是能懂的
你用在论文里别人也能懂,但是既然你知道用过去式,而且表达的貌似更简单不是嘛,何必自找麻烦呢