有效

Pattern visualization

Examples

1. 这种方法非常有效。▶ —
   This method is very effective.
2. 这张票还在有效期内。▶ —
   This ticket is still within its valid period.

Collocations

Mnemonic

有 yǒu "to have" + 效 xiào "effect": having effect, i.e. effective; also valid. ① effective (有效方法) ② valid (有效期 = valid period). Opposite of 无效 (invalid, ineffective).

Related

Quick check

1. What is an antonym of 有效?

   • 无效 (invalid/ineffective)
   • 有用 (useful)
   • 管用 (works)
   • 有限 (limited)