关于句型it is the first time that ...It will be the first time that I_____ abroad.A haven't been B will not have been 为什么?

IT IS THE FIRST TIME THAT 句型是什么从句 关于句型it is the first time that ...It will be the first time that I_____ abroad.A haven't been B will not have been 为什么? 翻译成英文：这是你第一次来北京 用it is the first time句型 It is the first time that .这个句型中后面一定要跟完成时? It is the first time that .句型的问题.It is the first / second time…that…还有It was the third time that ...为什么是:It is the first time that I see you.It was the first time that I saw you.这个是我照句型写的...It is the first It is/was the first/second time that 这一句型中引导的是什么从句 可以省吗 汉译英：这是她第一次有机会到国外旅游,运用it is the first time when的句型. it is the first time 用法 It is first October.读时first前面加the吗? 关于it is句型的问题it is pleasant lying in the sun 与it is pleasant to lying in the sun有何区别? it is the first time 句型用法 众所周知,it is the first time that+完成时但是在有些书上看到了 it is the first time i see u这样的用法是不是应该改成 i have seen 如果想说 那是我第一次见你 应该说成it was the 英语 it is the first time 句型众所周知,it is the first time that+完成时但是在有些书上看到了 it is the first time i see u这样的用法是不是应该改成 i have seen u?如果想说 那是我第一次见你 应该说成it was t 请问：1,the first time 是不是可以是连词；2,it is the first time 是不是要用完成时；3,3,这是我第二/三……次做某事,这个句型里面的时态是用完成时吗? 请问：1,the first time 是不是可以是连词；2,it is the first time 是不是要用完成时；3,3,这是我第二/三……次做某事,这个句型里面的时态是用完成时吗? It is the first of May today.提问the first of May____ ____is it today? It is the first day of the new term. 请问 Is it the first time you enjoy the apple? it's the first time that这个句型,后面除了完成时还能其他时态吗?