my pen pals are arriving in Jingzhou next Sunday.为什么arrive要改

my pen pals are arriving in Jingzhou next Sunday.为什么arrive要改 I know you are arriving next sunday .这句英语中arriving为什么要用ing 形 They are arriving in Beijing next Sunday.,为何是are arriving而不是 I know you are arriving next sunday.为什麽arrive是ing形式 I know you are arriving next sunday They are arriving ()Tokyo next Sunday i know you are arriving next sunday 为啥arriving后面要加ing We are ____ Ji’nan next week.A.arriving in B.arrive in C.arr I konw you are arriving next Sunday 为什么用ING形式,将来时不是BE GOING They are __(arrive ) next Sunday.原因 l know you are arriving next Sunday的中文翻译 I know you are arriving next sunday什么意思