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
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