It is easy to learn English ,but it is difficult to learn it well.这里well前面为什么有个it

问题描述:

It is easy to learn English ,but it is difficult to learn it well.这里well前面为什么有个it

it代表的就是Englsih,learn是及物动词,后面要加名词或者代词,前面已经出现了一个English,为了使句子不罗嗦重复,就用it表示.