强调句中被强调成分如果是人,且做主语时, 可以用who或that, 除此之外, 一律用that.
例如: It was Tom who/that helped the old man cross the street yesterday.
It was the old man that Tom helped cross the street yesterday. (被强调成分是人,但不是做主语时, 不能用who,也不能用 whom)
It was yesterday that Tom helped the old man cross the street .
追问如果把Tom替换掉 用"她"来表示 应用什么 she her ？
追答这是强调主语,所以应该用主格she .
追问可是作业中用的是her
追答用her不对, 除非是强调的宾语或表语.
你最好把那个句子写出来, 我给你看一下,才知道对错.
追问是在强调人的时候
It was _____ who you met yesterday .
追答这个填her是正确的, 因为是对宾语进行强调. 因为her是做met的宾语.
虽然这个句子是用的who引导强调句, 但强调宾语的人用who这种情况不是很正式.多用于口语中.