it was the first time 后面为什么要用过去完成时

英语翻译翻译 it is the first time tim has ever been to another country. It was the first day of the 10th moon. it is/was the first time that有什么用法 it was the first time 后面为什么要用过去完成时 it was the first time连接过去时还是过去完成时? it was the first day of biology class翻译 Galileo was the first man to prove it! It was first January,the first day of the.thIt was first January,the first day of the.that they are there for me where was( )the first computer was made?A.it that B.it C.time D.that 1）i dropped the baton on the groud when i was——it on to Tim 英语翻译⒈But at the moon gave far too much light.I didn't dare open a window.⒉I didn't go down stairs until the window had to be shut .The dark rainy evening the wind the thundering coulds held me entirely in their power ;it was the first tim 英语翻译it is the first time +现在完成时----------it is the first time that I have seen a tiger.it was the first time+过去完成时-----------It was the first time that he had said ( that )he loved me. it is the first time和it was the first time后面接的时态各是什么? 选择句子,完成对话Tim:Mum, I helped lots of people today.Mum:( 1)Tim:Yes. First I helped Kate to find her discman in the schoolMum:Where did you find it?Tim:(2)Mum:And then?Tim:On the way home , Itook a man's arm and we crossed the street.Mum: 用for.the.first.time和at.first 和it.was.the.first.time和the.first.time各造一个句子,说明她们的区别 it was the first newspaper sold on trains .sold前可加that was?为什么? 修改一篇英语作文There will be held a public transport week activity for the first time in the city from 16th to 20th ,september,2007.This activity will be held in beijing,shanghai,tianjin and so on .It was held in about 108 cities at same tim （1）It's the first time Tim has ever been to another country.tim以前从没去过其他国家,是第一次.（2）Tim's brother has never been abroad before.Tim的brother以前从没出过国.这2和1有什么区别?