例句:Students have to clean up the classroom every day.
翻譯:學生們每天必須要打掃教室。
變化
● 原形:clean [klin]
● 現在式單數:cleans
● 過去式:cleaned [kl'ind]
● 過去分詞:cleaned [kl'ind]
● 現在分詞:cleaning [ˋklinɪŋ]