This is the teacher________ often helps me.A.that B.where C.who D.when 选哪个?为什么?是单选么?
问题描述：
This is the teacher________ often helps me.A.that B.where C.who D.when 选哪个?为什么?是单选么?
答案我知道了（高人指点）如果没有this is 那么A和C都可以
但如果有this is 或 that is 为了避免混淆，此时英语中通常不用that引导定语从句!
答
C.who
who引导宾语从句,意思是常帮助我们的那个老师.
这就是那个常帮助我们的那个老师.请问that有什么问题？看一下从句，Who often helps me. 首先是人，另外你把引导词代时去发现只有who是适合的。that可一做主语啊,如He is the last person that I want to see.(他是我最不想见到的那个人)比较一下，你就会发现不同 that I want to see. tha引导的这个从句中有主语“I”who often helps me who引导的从句并没有主语，而是"who"做主语所以这个句子只能选who