when you use 才 to say something about time, number, length and so on, it means ONLY. so 我的才花了五百 is Mine costs only 500 yuan. here 花了 is to cost or to spend but not flower. 花费 n. cost and if you use 才 after time, number or length, generally, you want to say it is so long or so much. here 葡萄还没有熟 not ripe yet 再等两个星期才能吃 it is so long if you say 才等了两个星期就能吃了 it is so soon for only too weeks hope this help

我的花了五百。this is only a simple declarative sentence,unemotional.我的才花了五百。this is a contrastive sentence(means mine is cheaper than urs,u must cost more than 500),here 才(起强调作用)=only ,emphasize i cost less than u. the same,“再等两个星期才能吃”,here 才 emphasize,should wait another two weeks. some other sentences: 我不在乎means i don't care,我才不在乎 means i don't care at all. here 才 also is emphasize 你怎么才来？implicate why you come so late? emphasize come too late. 我才来这儿，你就让我干这干那的。“i just came here...” emphasize i come here not longer if a sentence add 才，it becomes more emotionalize,usually used when complaining or dislike sth.

the "才" in the first sentence means something u paid was very cheap , if u change the "才" as "要"，我的要五百了，that means u feel it's expensive,no 才,no these meaning. the 才 in the second sectence, if it havent 才，the sentence sonds awkward.

the bro of the 1st floor's answer is correct but not whole. Not only dose it mean too less , also means too long(only refers to time). take an example of the 2 sentences u gave, the first one happens to coincide with the former--too less. likewise, the second one coincides with the latter--too long...so technically, the explanation of the 2nd sentence of Maple is WRONG, this sentence tries to convey that "2 weeks" is very long time to the author, he/she nearly couldnot wait for it, but he/she had to. plus, it can convey something unexpected, sth doesn't go to be what it is supposed to be(short), for example: 你怎么才来? 你怎么才知道？also,here, it means the time is too long, but this "too long" is unexpected, so when u're shocked ,annoyed or u just simply wanna know why, u can use it. okay, i think i am done explaining it. still having some questions about it or other questions of chinese, u can contact me: [email protected]. ^o^

1.我的花才花了五百元。 才+ v + time/number ... “才”＝only 2.“才”is used t indicate laterness, slowness or difficultness of an act, or that something is going on unsmoothly. time/number + 才+v. e.g. 昨天他十点钟才起床。