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](/uploads/image/z/5232066-42-6.jpg?t=%E5%85%B3%E4%BA%8Esince%E5%BC%95%E5%AF%BC%E7%9A%84%E6%97%B6%E9%97%B4%E7%8A%B6%E8%AF%AD%E4%BB%8E%E5%8F%A5She+has+changed+much+since+I+taught+her.%E8%87%AA%E4%BB%8E%E6%88%91%E4%B8%8D%E6%95%99%E5%A5%B9%E4%BB%A5%E6%9D%A5%2C%E5%A5%B9%E5%8F%98%E5%8C%96%E5%BE%88%E5%A4%A7.We+haven%27t+heard+from+John+since+he+worked+there.%E8%87%AA%E4%BB%8E%E7%BA%A6%E7%BF%B0%E4%B8%8D%E5%9C%A8%E9%82%A3%E9%87%8C%E5%B7%A5%E4%BD%9C%E4%BB%A5%E5%90%8E%2C%E6%88%91%E4%BB%AC%E5%86%8D%E4%B9%9F%E6%B2%A1%E6%9C%89%E6%94%B6%E5%88%B0%E4%BB%96%E7%9A%84%E6%9D%A5%E4%BF%A1.%E4%B8%BA%E4%BB%80)
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