一.主从句时态呼应,即主句用现在时,从句也用现在时;主句用过去时,从句也用过去的某种时态,除此之外,主句用将来时,从句依然要用现在时。
eg. Be careful when you cross the road。
When he was seven years old, he could swim.
When she leaves, she will turn off the light.
二. 不同的时间状语需要搭配不同时态的使用:
1.Often,usually----------动词原型do,does,am,is, are
2.yesterday,last Sunday,in the past-------动词过去式did,was,were
3.now--------be+doing
4.while,at that time,-------was doing,were doing
5.since从句,for 2 days,------have done,have been
since+过去的某个时间点----had done,had been
一般现在时:every…, sometimes, at …, on Sunday,
一般过去时:yesterday, last week, an hour ago, the other day, in 1982, just now
一般将来时:next…, tomorrow, in+时间,
现在完成时:for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently
过去完成时:before, by, until, when, after, once, as soon as
过去进行时:this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while
将来进行时:soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening
以上就是关于“SAT语法中的时间状语从句时态”的内容,希望通过上述内容的学习,能够辅助大家更好的备考接下来的考试,预祝同学们在考试中取得高分成绩,早日实现留学梦想!更多精彩内容,敬请关注本频道的持续更新!