This is first time I have been a babysitter.中的have可去掉吗?

This is the first time that I ______(be)there NO,This is the first time I chat with you This is the first time I ______(wear)this kind of dress. this is the first time i came to china和this is the first time i have been to china有什么区别? first time login,this is a test This is the first time when I go abroad,还是that I go abroad?I've been abroad for the first time.里有个for，那为何不写成This is the first time that I have been abroad for. This is the first time that I have...为什么要用have This is the first time I adjust my attitude towards 半命题作文 This is the first time that I have seen him 是什么结构?that 充当什么成分? This is the first time that i have come beijing.为什么用have this is the first time that i to Mountain Tai填have been还是came this is first time that i take the plane..是定语从句吗? This is first time I have been a babysitter.中的have可去掉吗? I think this is the first time that we have met._anywhere. This is the first time I( )(see)such a wonderful movies This is my first time to come here,Perhaps I will ______some difficulties This is the first time I have been a babysitter 啥意思? This is the first time I have not wanted a college class怎么译