could

on Basic words

also on

• CEFR Elementary (A2)?
• CEFR Intermediate (B1)?
• CEFR Upper intermediate (B2)?
• Band 2 (BND2)?

can的过去式, 可以

• couldn't

  couldn't

  (abbreviation)

  不能（等于could not）
• couldn't

  couldn't

  (verb)

  不能
• could

  could

  (modal)

  can的过去式
• could

  could

  (verb)

  可以

Forms

abbreviation	verb	modal
couldn't	couldn't	could
	could