neng（能） = be able to do sth hui（会）= can they r similar

"能"Means you have the ability to do something."会"means you accept and are willing to do something.

The three words do have overlapping meanings in many cases. But there are still some difference between each other. 可以 (kěyǐ), 能 (néng) and 会 (huì), when used as a verb, are similar in sense of "can / will." Maybe we can learn them from the other way around. We'll examine the definitions of the English words of "can" and "will" to understand the subtle difference between 能, 会 and 可以. Let's look at the Chinese equivalents of the different definitions of the English word "can." 1. to be able to; have the ability, power, or skill to: She can solve the problem easily. [Chinese] 能, 会, 可以: 她能 (or 会/可以) 很容易地解决这个问题。 2. to know how to: He can play chess, although he's not particularly good at it. [Chinese] 会: 他会下棋，虽然水平不太高。 3. to have the power or means to: A dictator can impose his will on the people. [Chinese] 会, 可以: 独裁者会 (or 可以) 将自己的意志强加于人民头上。 4. to have the right or qualifications to: He can change whatever he wishes in the script. [Chinese] 可以: 他可以随意修改剧本。 5. may; have permission to: Can I speak to you for a moment? [Chinese] 能, 可以: 我能 (or 可以) 和你说几句吗？ 6. to have the possibility: A coin can land on either side. [Chinese] 可能 (be aware that it's different from 可以 or 能): 硬币的任何一面都可能着地。 Now, check out the sense of "will." 1. am (is, are, etc.) about or going to: I will be there tomorrow. She will see you at dinner. [Chinese] 会: 我明天会去。她明天晚餐会去见你的。 2. am (is, are, etc.) disposed or willing to: People will do right. [Chinese] 会: 人民会做出正确的选择。 3. am (is, are, etc.) expected or required to: You will report to the principal at once. [Chinese] Informal 得, 要; formal 需要: 你得马上去向校长汇报。 4. may be expected or supposed to: You will not have forgotten him. [Chinese] 会: 你不会忘记他的。 5. am (is, are, etc.) determined or sure to (used emphatically): You would do it. People will talk. [Chinese] 会: 你会这么做的。人们会发出声音的。 6. am (is, are, etc.) accustomed to, or do usually or often: You will often see her sitting there. He would write for hours at a time. [Chinese] 会: 你会经常见到她坐在这里。他会一连写上几个小时。 7. am (is, are, etc.) habitually disposed or inclined to: Boys will be boys. After dinner they would read aloud. [Chinese] 总会, 总是: 男孩总还是男孩。饭后他们会朗读一会儿。 8. am (is, are, etc.) capable of; can: This tree will live without water for three months. [Chinese] 会, 能, 可以: 这棵树能 (or 会/可以) 在缺水的状态下生长三个月。 9. am (is, are, etc.) going to: I will bid you “Good night.” [Chinese] 会: 我会跟你道晚安的。 So, you see, when you want to say "can", it will be safe to use "能". If you want to say "will", "会" will be appropriate most of the time. "可以", on the other hand, tends to be more often used in cases of "have permission to", "be allowed to", or "may."