表示泛指时不加定冠词the,表示特指时要加上去,比如说：
Dogs are cleverer than cats.
Watches are not clocks.
The watches I bought were very expensive.
希望我能帮助你解疑释惑.
名词复数前面加不加定冠词the 什么时候情况下加,什么时候不加.例如：the elephants 或 elephants
表示泛指时不加定冠词the,表示特指时要加上去,比如说：
Dogs are cleverer than cats.
Watches are not clocks.
The watches I bought were very expensive.
希望我能帮助你解疑释惑.