才 can be noun. means: talent ( don't need explain here, because 你很有才。You are very talent.) can be adv. means: only ( here are some different function in the sentences) 1. (time) later than speaker expect E.g: 他10点才来。(tā shí diǎn cái lái.) He only comes at 10 o’clock. (later than I expect, I thought he comes 8 or 9…) 我们下午才开会。(wǒ mén xià wǔ cái kāi huì.) We will only have the meeting this afternoon. ( later than I expect, I thought this morning) 你怎么才来？(nǐ zěn me cái lái?) Why are you arriving now? ( I thought you should come half hour ago…) 2. (quantity) less than speaker expect E.g: 他才吃了半个面包。(tā cái chī le bàn gè miàn bāo.) He only eat half of the bread.( That’s not enough, I expect he ate more.) 他才50岁。(tā cái 50 suì.) He is only 50. ( OMG, he looks like 70 years old grandpa.) 3. (time) shorter then speaker expect E.g: 我才到家，电话就响了。(wǒ cái dài jiā, diàn huà jiù xiǎng le.) The phone ringed as soon as I got home. (I didn’t even have a break.) 她来这工作才两个月。(tā lái zhè gōng zuò cái liǎng gè yuè.) She has worked here only two months. ( I thought she came here long time ago.) 4. only (choice) (usually in phrase, means: that’s the only option. ) E.g: 只有他，才知道开会时间。(zhǐ yǒu tā, cái zhī dào kāi huì shí jiān.) Only he knows the meeting time. (no one else) 学生只有用功，才能取得好成绩。(xué shēng zhǐ yǒu yòng gōng, cái n éng qǔ de hǎo chéng jī.) Only studying hard, can let students get good marks. (don’t know whether cheating can help as well?:) 5. refute E.g: A: 你疯啦！(nǐ fēng la!) Are you mad? B：你才疯啦！(nǐ cái fēng la!) You are mad! Courtney said:5 really. This is wrong. You will hear lots of girls say this to the boyfriend: 我才不喜欢你呢！（wǒ cái bù xǐ huān nǐ ne!) I don't like you! ( In fact, means she loves the boyfriend, but too shy to say that. doesn't mean: don't like you.)

1) it's only in certain conditions or for some reason ①only…if 学生只有用功，才能取得好成绩。 Students will only be able to do well if they study hard. ② only after 他解释后，我才明白了他为什么那么难过。 It was only after he explained that I understood why he was so sad. 2）it can be a noun which means ability or talent 天才genius 3 ） just 我才到家，电话就响了。 Just as I arrived home, the phone rang. 4） not…until 路上堵车，我10点才到单位上班。 Because of the traffic jam, I did not arrive at work until ten. 5） really 他才不愿意见你呢！ He really doesn't want to see you!

when 才 is a noun, it means talent, when 才 is a adverb or conjunction, it means just now. You are talented. 你很有才。 I just heard about it few minutes ago. 我几分钟前才听说。