(1)表示听众,观众,作主语时,谓语可单可复
The audience is/are listening attentively.
观(听)众在认真听。
(2)形容观(听)众人数多(少),用 large、small、thin、crowded 修饰
There was a large audience of young people at the pop concert.
流行音乐会上有大量年轻人。
(3)有时可用复数形式
He addressed audiences all over the country.
他向全国观众作演讲。
(4)有时可表示读者
The book has a large audience.
这本书吸引了大量读者。