auxiliary verb / modal verb HSK 2
cannot · may not · not allowed to · must not

Meaning

不可以 expresses prohibition or lack of permission. It literally means 'not can/may' and is used when telling someone they are not allowed to do something, or when asking if something is not permitted. It is stronger and more direct than 不能 when expressing rules or prohibitions.

Usage

不可以 is commonly used by parents, teachers, or authority figures to forbid actions, and appears frequently in rules and regulations. It's the standard negative response to questions like 可以吗? (May I...?). In casual speech, it can be shortened to 不行 for a blunter refusal. The tone is firm but not necessarily harsh.

Examples

  1. 01
    对不起,这里不可以拍照。
    Duì bu , zhè pāi zhào.
    Sorry, you're not allowed to take photos here.
  2. 02
    妈妈说我不可以吃太多糖。
    ma shuō chī tài duō táng.
    Mom said I can't eat too much candy.

Characters

Common collocations

  • 这里不可以吸烟
    zhè yān
    smoking is not allowed here
  • 不可以这样
    zhè yàng
    you can't do it this way
  • 绝对不可以
    jué duì
    absolutely not allowed

Antonyms

Origin

可以 historically combines 可 (permissible) and 以 (to use/do), creating the meaning 'permissible to do' or 'may do.' Adding the negative 不 creates the opposite meaning.

Related