考前赢分第27天
核心知识
it的用法
it有许多不同的用法，主要有下面几种情况，最常用的是：
一、指前面提到的东西：
1. He bought a book and gave it to me.（代 表前面的中性名词，这类情况最多）
2. He has a baby, he loves it（or him or her）.（It可以代表baby）
He has got a pig，he has kept it five months.（It可代表动物）
3. He tried to get up, but found it impossible.（指句子前面某部分表示的意思）
He learns music, and it will take him many years.
I must say something, but it is impossible.
4. He arrived yesterday, but nobody knows it.（代表前面整个句子，但在这种情况下用 that更好一些。）
John hates children, and it is strange.
That she knows him and they have been schoolmates, it is a fact.
