WHENI WAS READINGIHEARDSOMEONE-----(KNOCK)AT THE DOOR

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!
其他人气:140 ℃时间:2019-11-17 02:00:51
优质解答
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
我来回答
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