第一句：We had to wait until he came back.

来源：学生作业帮编辑：搜搜考试网作业帮分类：英语作业时间：2024/05/11 01:39:07

第一句：We had to wait until he came back.
第二句：I won't go until he comes back
为什么第一句came不加S,而二句come加S不是Until引导时间状语从句吗,既然是引导时间状语从句为什么第一句不用一般现在时代替一般将来时呢?
在什么情况下Until引导时间状语从句
还有什么是持续性动词什么是瞬间性动词
请各位高手帮我好好讲讲.

came是come的过去式所以不加S,在状语从句中前后时态要相互应.持续性动词表示可持续的动作瞬间性动词表示短时间内完成的动作

I had to wait until he came back改为一般疑问句 He didnt leave until we came back 改同义句 he had to wait until one of his coworkers came to work and - There was nothing to do（） wait until he came back. he didn't go to bed until his mother came back (改为同意句） he didn't go to sleep until hie mother came back home.（改为同义句 I didn't go to bed until my father came back.came back可以用had I did not go to bed until he came back I didn't go to bed until he came back. we will wait until he____(回来)back. I___(wait) until he comes back Wait until he _(come)back.