How common it is
就是 appears often in everyday Chinese, so it is worth practicing early and reviewing often.
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Pronunciation focus
Say jiù shì slowly first, then repeat it in a short phrase. Listen for the tone shape.
Usage note
就是用来表示某事完全符合或准确描述某个情况。
jiù shì yòng lái bǎo shí mǒu shì wán quán hé fú huò gǔng miáo dé mǒu gè kuàng jíng.
就是 is used to indicate that something perfectly fits or accurately describes a situation.
Context note
就是在描述事实或解释原因时使用。比如：你最喜欢的颜色就是蓝色。这就是为什么我选择这个答案。
jiù shì zài miáo shù shí wèn huò jiě shì yuányīn shí sòng yòng.
就是 is used when describing facts or explaining reasons. For example: 你最喜欢的颜色就是蓝色。这就是为什么我选择这个答案。 (Your favorite color is exactly blue. That's why I chose this answer.)
5 examples
他就是我的好朋友。
tā jiù shì wǒ de hǎo péng yǒu。
He is exactly my good friend.
这就是正确的做法。
zhè jiù shì zhèng què de zuò fǎ。
This is exactly the correct way to do it.
你就是对的。
nǐ jiù shì duì de。
You are exactly right.
这就是为什么我迟到了。
zhè jiù shì wèi shén me wǒ chí dào le。
That's exactly why I was late.
他就是喜欢吃甜食。
tā jiù shì xǐ huan chī tián shí。
He is exactly someone who likes sweet food.
5 mini stories
妈妈说，这就是为什么她喜欢这个蛋糕。爸爸同意了。
mā ma shuō， zhè jiù shì wèi shén me tā xǐ huan zhè ge dàn gāo。 bà ba tóng yì le。
Mom said, that's exactly why she likes this cake. Dad agreed.
小明就是个爱学习的孩子。他总是第一个到教室。
xiǎo míng jiù shì gè ài xué xí de hái zi。 tā zǒng shì dì yī gè dào jiào shì。
Little Ming is exactly a studious child. He is always the first to arrive at the classroom.
这就是为什么我们选了这个方案。它确实有效。
zhè jiù shì wèi shén me wǒ men xuǎn le zhè ge fāng àn。 tā què shí yǒu xiào。
That's exactly why we chose this plan. It really works.
他就是个爱笑的人。每次见到他都会让人开心。
tā jiù shì gè ài xiào de rén。 měi cì jiàn dào tā dōu huì ràng rén kāi xīn。
He is exactly a person who loves to laugh. Meeting him always makes people happy.
这就是为什么我选择了这条路线。它最短也最快。
zhè jiù shì wèi shén me wǒ xuǎn zé le zhè tiáo lù xiàn。 tā zuì duǎn yě zuì kuài。
That's exactly why I chose this route. It's the shortest and fastest.