597　scream，shriek，shout，yell和roar

① scream和shriek都是指发出尖锐的声音或调子。

The little girl screamed with delight when she saw the birthday cake. 看到生日蛋糕时，小女孩高兴得尖叫起来。

She screamed that there was a snake under the table. 她大声尖叫说桌子下面有蛇。

She shrieked in fear thinking someone was chasing her. 她害怕得尖叫起来，以为有人在追她。

② shout指大声地喊叫，以便声音传向远处或高于其他声音。

I shouted good-bye to my friend as the train pulled out of the station. 火车驶出车站时，我大声地向朋友喊再见。

③ yell指大声地叫喊，一般用于与人有关的声音，通常是不受控制的感情的流露。

Don't yell at me like that！别像这样对我喊叫！

The boy yelled with pain. 那男孩疼得大声喊叫。

④ roar指响而深沉的声音或噪声。

The lion is roaring in the cage. 狮子在笼子里吼叫着。

The class roared with laughter. 全班哄堂大笑。