我听到敲门声
I heard a knock at the door
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我听到敲门声，好像有人想要出去。
I could hear knocking, as if someone wanted out.
youdao
我听到敲门声马上就把房门打开了。
When I heard the knock, I opened the door of the room at once.
当我听到敲门声，我马上就开门了。
Hardly had I heard the knock when I opened the door.
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