"Watch TV" in Engpsh is commonly expressed as "watch television" or simply "watch TV". It is a phrasal verb that has been widely used in Engpsh-speaking countries, especially in daily conversation.
Examples:
Can you turn on the TV? I want to watch some news.
(你能打开电视吗？我想看看新闻。)
Do you have any plans for tonight? I'm thinking about just watching TV at home.
(你今晚有什么计划吗？我在想在家里看电视。)
I'm so tired after work. I just want to relax and watch TV.
(工作后我太累了。我只想放松一下，看电视。)