英语：it is + that 强调句型的应用

It is the student that/who makes me happy.
这个是正确的说法.
如果说是指人的话,就可以用who,当然,that,是通用的.
改成students之后,就用应该it is the students that make me happy.
再强调句型中的要注意的就是还原,还原回一般句子,譬如说你这句话的一般句应该是the student makes me happy.那你现在要强调的是主语,所以只要把主语提前到句型的it is 后面.当你变成复数时,就意味着原来的句子是 students make me happy.所以强调主语时候变为it is the students who make me happy.