Usage note
有效表示有作用、能达到目的。
yǒu xiào biǎo shì yǒu zuò yòng 、 néng dá dào mù dì。
有效 means useful and able to achieve a goal.
Context note
有效常用于方法、药物和时间。
yǒu xiào cháng yòng yú fāng fǎ 、 yào wù hé shí jiān。
有效 is often used with methods, medicine, and time.
5 examples
这个方法很有效。
zhè ge fāng fǎ hěn yǒu xiào。
This method is very effective.
药很有效。
yào hěn yǒu xiào。
The medicine works well.
你的建议很有效。
nǐ de jiàn yì hěn yǒu xiào。
Your suggestion is very effective.
这个证件还有效吗？
zhè ge zhèng jiàn hái yǒu xiào ma？
Is this document still valid?
有效时间是今天。
yǒu xiào shí jiān shì jīn tiān。
The valid time is today.
5 mini stories
老师说这个学习方法很有效。
lǎo shī shuō zhè ge xué xí fāng fǎ hěn yǒu xiào。
The teacher said this study method is very effective.
他用了一个有效的办法。
tā yòng le yí gè yǒu xiào de bàn fǎ。
He used an effective method.
医生说药物很有效。
yī shēng shuō yào wù hěn yǒu xiào。
The doctor said the medicine works well.
我们要找更有效的解决办法。
wǒ men yào zhǎo gèng yǒu xiào de jiě jué bàn fǎ。
We need to find a more effective solution.
这个办法虽然简单，但很有效。
zhè ge bàn fǎ suī rán jiǎn dān， dàn hěn yǒu xiào。
This method is simple, but it is very effective.
Mini dialogue
吃药
A
这个药有效吗？
Zhège yào yǒuxiào ma?
Is this medicine effective?
B
很有效，我吃了两天就好了。
Hěn yǒuxiào, wǒ chī le liǎng tiān jiù hǎo le.
Very effective. I took it for two days and got better.
学习方法
A
每天读中文书有效吗？
Měitiān dú Zhōngwén shū yǒuxiào ma?
Is reading Chinese books every day effective?
B
当然有效，你的进步会很快。
Dāngrán yǒuxiào, nǐ de jìnbù huì hěn kuài.
Of course it's effective. Your progress will be very fast.
Related words and contrasts
similar
管用
guǎn yòng
effective; useful
More casual, often used in spoken Chinese.
opposite
无效
wú xiào
ineffective; not working
Direct opposite, meaning something does not work.
related
有用
yǒu yòng
useful
Focuses on general usefulness rather than achieving a specific result.