再来巩固下主谓宾It's my business to look after your health1.这儿my business是形式主语,真正的主语是to look after your health因为主语是名词所以your health也要的 2.这儿用这个to是因为表示计划想好要做某事

再来巩固下主谓宾It's my business to look after your health1.这儿my business是形式主语,真正的主语是to look after your health因为主语是名词所以your health也要的 2.这儿用这个to是因为表示计划想好要做某事
再来巩固下主谓宾It's my business to look after your health
1.这儿my business是形式主语,真正的主语是to look after your health因为主语是名词所以your health也要的 2.这儿用这个to是因为表示计划想好要做某事而且是主动 3.如果是被动是不是to就不用了,如：to refer to…as,如果不是因为被动把to给省略掉了,那这儿的to refer to中的第一个to又为什么没有呢People who work in offices are frequently referred to as 'white collar workers' for the simple reason wear a collar and tie to go to work.4.我知道这儿主语是不定式,不定式能做同位语和补语么,这儿to是business的同位语和补语么,这4个问题对么

再来巩固下主谓宾It's my business to look after your health1.这儿my business是形式主语,真正的主语是to look after your health因为主语是名词所以your health也要的 2.这儿用这个to是因为表示计划想好要做某事
好像有问题,It's my business to look after your health这一句中it是形式主语,替代“to look after —”的不定式短语,并有表强调的意思.
it作形式主语代替不定式短语.如：
It is necessary for us to learn something about the use of “it”.
对我们来说了解一些“it”的用法是必要的.
it作形式宾语
代替不定式(短语).如：
I found it very interesting to study English.
我觉得学习英语很有趣.
it强调句的几种强调情况
要强调句子的某一部分(通常是主语、宾语、状语)时,通常用 “It is(was)＋被强调部分＋that(who)＋句子的其余部分”这种句子结构.强调部分指人时用who或that,指其他成分时用that.假如原来的句子为：
David bought a walkman from a store yesterday.
大卫昨天在商店买了一台随身听.
下面四个强调结构分别强调句中的主语、宾语和两个状语.
It was David who/that bought a walkman from a store yesterday.(强调主语 David)
It was a walkman that David bought from a store yesterday.(强调宾语walkman)
It was from a store that David bought a walkman yesterday.(强调地点状语 from a store)
It was yesterday that David bought a walkman from a store.(强调时间状语 yesterday)