英语单词各种形式的解说 列:ing、过去式、第三人称单数………答:try,tries,trying,tried worry,worries,worrying,worried ask,asks,asking.asked catch.catches.catching, caughtwalk,walks,walking must(情态动词无变化)begin,begins,beginning.began sleep,sleeps,sleeping,slept borrow, borrows,borrowing,borrowed use,uses,using,used keep,keeps,keeping,kept rent,...