突然的形容詞可以用 sudden（聽發音）這個寫法，其實就是把副詞字尾去掉 ly 而已，例子如突然的攻擊英文是 sudden attack、突然的移動英文是 sudden movement、突然的崛起英文是 sudden rise、突然發作英文是 sudden onset。
突然英文造句練習
Suddenly it began to rain.突然下起雨來。
Arthur suddenly screamed, scared everyone.
亞瑟突然大叫一聲，嚇了大家一跳。
Anna suddenly visit, really surprised.
安娜突然造訪，真是又驚又喜。
Long-lost classmates suddenly said he will be married.
好久不見的同學突然說要結婚了。
The front car suddenly brakes, causing me almost hit.
前面的車子突然踩煞車，害我差點撞上去。
Roadside suddenly rushed out a puppy.
馬路邊突然有一隻小狗衝出來。
The teacher suddenly came into the classroom and said now to start quiz.
老師突然走進教室說，現在要開始隨堂測驗。
Adam suddenly told Avril to break up.
亞當突然跟愛薇爾說要分手。