但为什么This is my first time to have been here.里要用完成时?谢谢~~

This is My first 但为什么This is my first time to have been here.里要用完成时?谢谢~~ this is my first time______（cook） This is my first visit ________ China. This is my first bag中first前要加the吗 This is my the first time to Shanghai.应怎样改正?为什么? this is my first vist__on__Beijing,so everything is new_for__me.对么? this is my first pagethis is my first pagealign=center请注解一下好吗 连词成句my Australia is first visit this to this is my first time and it`s very this is my first time to do like this is my first time to go to there.this is a good day hanging out. This is my first time to receive your emailThis is my first time to receive your email 翻译 Miss li,this is my father.为什么用this is This is _____ first lesson.A.a B.an C.my D.this说明原因- - My teacher is talking（）my parents.This is the fiMy teacher is talking（）my parents.This is the first e-mail（）my new friend. This is my homepage,it's very poor,Now,because it's my first homepage. This is my first visit to/on Beijing.So everything is new for/to me.