精选优质文档-倾情为你奉上 一、双基提要It的用法1人称用法人称用法是指it可以用来代替一个名词、一个短语、一个从句或一个句子,以避免它们在句中的重复。这时它可以指提到过的,也可以指未提到过的,在句中作主语或宾语。(1)指非生物、动植物和不明性别的婴儿。That is a new magazine. I bought it this morning.(2)指成员众多的集体The acrobats performed for a large audience last night. It was very excited by the show.(3)指某一动作或事情 I like dancing,but she doesnt like it.2指示用法指示用法是指it用在句型“It is/was+表语”中,指明某人或某物的身份。这时它可以代替this或that,作用同this或that,指提到过的或未提到过的。Whats that? Its a computer