被强调的是人的时候,用who,或that。
被强调的不是人,就用that
如。It was Tom who / that told her the news
It was a bike that he bought yesterday
that可以是人、物,句子,介词短语等等都可以,who只用于人。
被强调的是人的时候,用who,当然用that也不算错。
不过所强调的不是人,那么就只能用that了
如果被强调的是人的话,就可以用who代替that
如 it is i who/that paid a visit to the factory.