Translation of "watching" into Chinese

I watch my weight very carefully.

我非常注意我的體重。

Vaughn is playing nice, but he's watching me.

Vaughn 现在 还 不错 但 他 会 监视 我

She employed a private detective to keep a watch on her husband.

她僱了一個私人偵探看守她的丈夫。

They watched her gradually weaken as the disease progressed.

他们观察到她随著病情变化身体也渐渐衰弱下去。