Chinese · Aspect & Time: 了, 过, 着

再, 又 or 还

English often translates all three words as "again" or "still", but Chinese keeps them apart.

又 means again for something that has already happened, often with 了: 他今天又迟到了 (he was late again today), 外面又下雪了 (it's snowing again).
再 means again for something that has not happened yet: requests, plans, and "first A, then B": 请再说一遍 (please say it again), 吃完饭再去 (go after we've eaten). 再也不 means never again.
还 means still (还没睡, still not asleep; 还早, still early) or in addition (还要别的吗？ anything else?; 除了英语，还会法语, French as well as English).

Watch out: 再 (zài, again) sounds exactly like 在 (zài, at / in the middle of). When you type "zai", choose 再 if you mean "again".

Examples

请说一遍。Show answer

请再说一遍。

他昨天迟到了，今天迟到了。Show answer

他昨天迟到了，今天又迟到了。

都十二点了，你没睡？Show answer

都十二点了，你还没睡？

我们吃完饭去看电影吧。Show answer

我们吃完饭再去看电影吧。

你看，外面下雪了。Show answer

你看，外面又下雪了。

他三十岁了，没结婚。Show answer

他三十岁了，还没结婚。

这件事明天说吧。Show answer

这件事明天再说吧。

你怎么忘了带钥匙？Show answer

你怎么又忘了带钥匙？

你要别的吗？Show answer

你还要别的吗？

你等一会儿，他马上就到。Show answer

你再等一会儿，他马上就到。