We make it a rule to knock at the door before you come in.I

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/04 02:52:47

We make it a rule to knock at the door before you come in.I find it easy to answer this question.
it代替的是什么呢?还有什么时候用that代替?

it 在句中作形式宾语谈不上用that代替.
第一个指代to knock at the door before you come in
第二个指代to answer this question.
再问：什么时候会用that代替（不是形式宾语）是关于代词类的
再答： it that 在指代某个不确定的物时可以相互替换
再问：能具体点么？举个例子，我这一点不太懂，谢谢~
再答： what is it？-that is an apple或者it is an apple
再问：有没有种情况是只能用that代替？谢谢谢谢！
再答：那就只有指人的情况下了。who's that? that is my sister.这里就不能用it了

We make it a rule to knock at the door before you come in.I 英语翻译before I come to knock at the door of adulthood,I feel a Please ____(knock)at the door when you come in. Tom,____(knock)on the door before you come in next time ——at the door before you enter my room A knock B knocking Ck ______ at the door before you enter my room, please. A．Knock 几道简单的英语改句子please knock at the door before you come into the Please_____on the door before you come in. i was about to go to bed()I heard a knock at the door Did you hear anybody knock at the door?No ,I ____ to my MP3 You should knock at the door before you you _____ the room.【 you should knock at the door before you the room.为什么用enter而不