有人在敲门 Someone's Knocking at the Door ; eg.Someone is knocking at the door ; Som ; somebody's knocking at the door. i'll answer it

以为有人在敲门 thought i heard a knock

谁在敲门 Who's knocking at the door ; who knocked at the door

机会在敲门 Opportunity Knocks

有人在敲我的门 Somebody's knocking at my door

上帝在敲你的门 God Knocking On Your Door

敲在门 knocking at the door

听到有人在敲我的门 hear sb doing

有人在不停的敲门 Somebody constantly knocking at ; Someone keeps knocking