The cat is on the sofa.

猫在沙发上。

Are the keys on the sofa?

钥匙在沙发上吗？

My books are on the sofa.

我的书在沙发上。

It is comfortable to sit on the sofa.

坐在沙发上很舒服。

However, if you are always sitting on the sofa and do no exercise at all, you will put on weight and harm your health.

然而，如果你总是坐在沙发上，完全不锻炼，你会增加体重并损害健康。

The kitten pee on the sofa.

小猫在沙发上尿尿了。

He fell asleep on the sofa.

他在沙发上睡着了。

I put a cushion on the sofa.

我在沙发上放了一个垫子。

A cat is sleeping on the sofa.

一只猫在沙发上睡觉。

I like to watch TV on the sofa.

我喜欢在沙发上看电视。