You are so early!I think it impolite to be late.it后面为什么不加is

you'd better后面是加原形吗,为什么i think it would be better to have.急, I think it difficult to answer this question 为什么可以it 不加is? I think it hard to fall asleep in night.请问it后为什么不加is. i think it is impolite to quarrel with her,填 isn't it 为啥 I think it diffcult to learn English well.为什么it后面不is?it在这里的作 i think so it is with you 2.I think it~s impolite to _____others .I agree with you. because sometimes I think it might be to late to call you帮我翻 why is ____ you are so late for the class?1.it that 2.that i It is impolite to（ ）others when they are talking. 英语翻译It's impolite to arrive late as it is usually planned to I know it is not easy for you to achieve.这句后面要不要加it 为什么