it is and that isit is good idea that is good idea 这俩句子都出现过 但是什么时候用it is 或者that is呢?

it is and that isit is good idea that is good idea 这俩句子都出现过 但是什么时候用it is 或者that is呢? That's the way it is 为什么要加it isit is 有什么作用吗? 英语猜谜语22221.what isit ,that was tomorrow and will be yesterday?2.it has a mouth,but mever speaks,it has a bed,but nerer sleeps on it.it has water,but nev-er drinks.what is it?3.our little johnhas a metal(金属）or plastic (塑料）shirt o It must be admitted that this condition -----better than it was formerly A be B isIt must be admitted that this condition -----better than it was formerlyA be B is c was D has been _____a good chance that in early 2009 i will be moving to Boston为什么这里要用there is 而不用it isit is 的话语法上有问题吗 翻译一句话：and it is well that it is so what time isit?It's forty-five^ English is used very widely , isit? It is raining very heavily.和改为感叹句 什么什么it isIt is raining very heavily.和改为感叹句什么什么it is raining and what is that in your( )( is it a pen? eraser,that,is,not,her,it,is,and mine造句 关于宾语从句的例句：Isit polite topointwithchopsticks at people in China?A:A:I want to know whether/if it is point to point with chopsticks at people in China.B:I don’t think that it is polite to point with chopsticks at people in China.1 求英语大神帮帮忙（宾语从句）例句：Isit polite topointwithchopsticks at people in China? A:A:I want to know whether/if it is point to point with chopsticks at people in China. B:I don’t think that it is polite to point wit 关于宾语从句的例句：Isit polite topointwithchopsticks at people in China?A:A:I want to know whether/if it is point to point with chopsticks at people in China.B:I don’t think that it is polite to point with chopsticks at people in China.1 跪求英语大神（宾语从句）例句：Isit polite topointwithchopsticks at people in China?A:A:I want to know whether/if it is point to point with chopsticks at people in China.B:I don’t think that it is polite to point with chopsticks at pe That is black when it is clean and white when it is dirty It _______ thest rare books that have benn stolen from the library.A was B were C are D isIt _______ these rare books that have been stolen from the library.A was B were C are D is句子也打错了，不好意思 It is different between this one and that one