As well as yes / no questions, you can also form tag questions with 吗 (ma). Tag questions are quick questions that are tagged on the end of a sentence to ask for /confirm/iation. In English, this is often done with "right?", or by adding the negative form of the verb phrase - e.g., "isn't it?".
The easiest way to do this in Chinese is to add an adjective and 吗 on the end of the sentence.
Basic Pattern
1. ……, 好 吗? ..., all right?
2.……, 对 吗? ..., right?
3.……, 是 吗?.., is that it?
4.……, 可以 吗? ..., is that OK?
By placing these on the end of a sentence, you can soften a suggestion or request /confirm/iation.
Examples
给我们十二瓶葡萄酒,可以吗?
你喜欢他,是吗?
他是你哥哥,对吗?
我们 喝茶,好吗?