关于since引导的时间状语从句She has changed much since I taught her.自从我不教她以来,她变化很大.We haven't heard from John since he worked there.自从约翰不在那里工作以后,我们再也没有收到他的来信.为什
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关于since引导的时间状语从句She has changed much since I taught her.自从我不教她以来,她变化很大.We haven't heard from John since he worked there.自从约翰不在那里工作以后,我们再也没有收到他的来信.为什
关于since引导的时间状语从句
She has changed much since I taught her.自从我不教她以来,她变化很大.
We haven't heard from John since he worked there.自从约翰不在那里工作以后,我们再也没有收到他的来信.
为什么延续性动词就要否定啊?根本原因是什么?
关于since引导的时间状语从句She has changed much since I taught her.自从我不教她以来,她变化很大.We haven't heard from John since he worked there.自从约翰不在那里工作以后,我们再也没有收到他的来信.为什
since后的从句谓语动词是延续性的,从动作结束算起.是非延续性动词从动作开始算起.这些是固定的.如 It is 2 years since he came here .他来这两年了.(came非延续)
It is 2 years since he lived here.他不住这两年了.(lived延续)
She has changed much since I taught her. 这个应该是我教过他之后他变化很大吧。
这个与否定没关系。
没有呀 这个观点是不正确的, 你看第一句change 就是肯定的嘛, 短暂性动词是不能用进行时态