例句:Why not knock on the door before you come in?
翻譯:在你進來前為何不敲門?
變化
● 原形:knock [nɑk]
● 現在式單數:knocks
● 過去式:knocked [n'ɑkt]
● 過去分詞:knocked [n'ɑkt]
● 現在分詞:knocking [ˈnɔkɪŋ]