别 + Verb
别 (bié) is placed before a verb to form a negative command meaning "don't." It is the informal, spoken equivalent of 不要 and is used to tell someone not to do something. It is direct and commonly used in everyday conversation.
别担心,一切都会好起来的。
bié dānxīn, yíqiè dōu huì hǎo qǐlái de.
Don't worry; everything will get better.
别玩手机了,赶紧写作业。
bié wán shǒujī le, gǎnjǐn xiě zuòyè.
Stop playing with your phone and hurry up and do your homework.
外面太冷了,别忘了穿外套。
wàimiàn tài lěng le, bié wàng le chuān wàitào.
It's too cold outside; don't forget to wear a jacket.