I'll go to meet you if I___free then为什么不能填was,要填am

I'll go to meet you if I___free then为什么不能填was,要填am i'll go to meet you if i ______ free then.A will be B would be C am D was 选C 为什么 to,I'll,go,see,to,you,nanjing(.) Possible,we‘’ll never have the chance to meet it,you never know,I have wanted to go with you ...Possible,we‘’ll never have the chance to meet it,you never know,I have wanted to go with youwish you happiness.EX求以上两句翻译,急. i'll have to go to an important meeting.为什么meet要加ing?为什么go总是要接to? I'll meet you at medonald's if you don't say,i'll go to sleep I hope we'll meet again sometime:I hope to see you be over 原句：I'll be over to meet you at the airport. I'll be over to meet you at the airport.这句话中的be over i'll be over to meet you at the airport请问这里的over怎么解释? I a______ you go to see the doctor.We'll go with you. （ ）——I think we'll go to plant trees next week. ——Terrific!Planting trees is a lot of fun.I'd like to ______ you.A.visit B.join C.follow D.meet i supposed we'll go to plant tress next week.terrific planting trees is alot if fun.i'd like to __ you.A.visit B.join C.follow D.meet I'll meet you __________we firet met each other two years go是用where还是用in which,为什么? I will go to Canada to meet you someday这个语法对吗? I'll go to the end with you I will wait for you.Silence 翻译：i have to go now,I'll talk to you soon ok?