I know you are arriving next sunday.为什麽arrive是ing形式

I know you are arriving next sunday.为什麽arrive是ing形式 i know you are arriving next sunday 为啥arriving后面要加ing I know you are arriving next sunday I know you are arriving next sunday .这句英语中arriving为什么要用ing 形 I konw you are arriving next Sunday 为什么用ING形式,将来时不是BE GOING I know you are arriving next sunday什么意思 I know you are arriving next sunday,应该是I know you are going I know you are ---- (arrive )next Sunday.所给词的适当形式填空、 I know you ___ (arrive) next Sunday. I know you are arriving next Sunday.Let me tell you... 英语翻译I know you are arriving next Sunday.Let me tell you the I know you are arriving next Sunday.Let me tell you