go fishing if it doesn't rain tomorrow为什么用dosen'train?

If it is fine tomorrow,we___（go）fishing It will rain.We won't go fishing.(用If连成一句话） If it ____.,we____.go fishing. Mr.Brown will go fishing if it ___(not rain)tomorrow. if it rains tomorrow,we won't go fishing.Then how about going shopping _____? Mr.Brown will go fishing if it ___(not rain)tomorrow.为什么不是isn't rain? go fishing if it doesn't rain tomorrow为什么用dosen'train? If it is fine,we shill go fishing.怎么变疑问句 If it doesn't rain,we will go fishing.这句话是虚拟语气吗? 翻译let's go fishing if is't find this weekend .but nobody knows if it will rain They will go fishing if it----fine tomorrow A wonThey will go fishing if it----fine tomorrowA won't.B doesn't C isn't.D won't be原因!谢 用所给单词的适当形式填空Mr Brown will go fishing if it ___(not rain) tomorrow If it doesn't rain tomorrow,I will go fishing.为什么要用doesn't而不用isnt 用所给的动词的适当形式填空:If it doesn't rain tomorrow ,I-------(go) fishing, If it ________tommorow ,we will go fishing.A.isn't rain B.won't rain C.does'nt rian He said that he would go fishing with his friends if it ________ (not rain) the next Sunday. As it was a fine day,they decided to go fishing.为什么用as?为什么用as,而不是if He asked me if I ______ (go) fishing that afternoon. We'll go fishing if it_____(not tain) this afternoon