WHENI WAS READINGIHEARDSOMEONE-----(KNOCK)AT THE DOOR为什么WHEN后加ING_其他解答

WHENI WAS READINGIHEARDSOMEONE-----(KNOCK)AT THE DOOR
为什么WHEN后加ING
不是在I HEAR后加吗/
告诉我规律
括号里的也要填!
谢谢!

人气：152 ℃　时间：2019-11-17 02:00:51

解答

WHEN I WAS READING I HEARD SOMEONE who was knocking AT THE DOOR
等于WHEN I WAS READING I HEARD SOMEONE being knocking AT THE DOOR
自己看语法书吧,别纠缠语法,理解就行