精选优质文档-倾情为你奉上语法专项复习之It的基本用法及句型It的基本用法:1. 人称代词it,是第三人称单数中性,代表前文已提到过 的一件事物。如: That vase is valuable. It is 200 years old. 2. 当说话者不清楚或无必要知道说话对象的性别时,也可用it来表示。如: Its a lovely baby. Is it a boy or a girl? 3. it可用来指代团体。如: The committee has met and it has rejected the proposal. 4. it用以代替指示代词this, that。如: - Whats this? - Its a pen. 5. 作指示代词的it,常用以指人或物。如: - Who is making such a noise? - It must be the children.6. it