1. 有些， 有一些：Theses two are the same. Means there are some + A 一些和某些：sometimes, they are the same. You can use both of them in most occasions. but 某些 in some occasions has an implicit derogatory meaning. For example, when you want to criticize one certain person but you don't want to mention the name, you can use某些 。like: 某些人就是太骄傲了。 To distinguish 有些和一些, you should know that 有些 中的“有”is a verb. 2. 任何人：anyone; 谁：who I think these two are clear. 3. 任何事情: anything; 什么事情：The meaning depends on situations. normally：it means what? 你找我有什么事情?: What do you want me for? 你因为什么事情不开心？ What are unhappy about? Sometimes, it means anything 他什么事情都不做。 He doesn't do anything. 4. 计划 ≈ 打算：both of them can be used as noun and verb. But 计划 is more formal. When you refer to the plan of the company or a serious career plan of your future, you use计划。Of course, in casual occasions, people may use 打算even when they talk about the development of a company. 5. 一定不能：must not do sth. very strong. 不一定能：not necessarily / not surely. 喝酒后，你一定不能开车。 You mustn't drive after drinking. 你不一定能成功。You may not necessarily succeed. 6. 非常、太、更多、很、好、特别 If your English is good enough, you can understand them in the following way. 非常 = 很 =好= very; 太 = too (You know "too big" means improperly big, but "too happy" means very happy); 更多 means more;