［析］ elder 和eldest是用来指家庭中兄弟姐妹的长幼关系，而older, oldest 则是指岁数大多少，如：She is three years older than I.
［误］ I'm tired. I can't go further.
［正］ I'm tired. I can't go farther.
［析］ far有两个比较级 farther 较远的，further 进一步的，如：Do you need any further explanation? 你需要进一步的解释吗?当然它也有两个最高级。farthest和furthest.
［误］ I went to Beijing University five years before.
［正］ I went to Beijing University five years ago.
［析］ ago常与过去时连用，而before则多与完成时连用。
［误］ - Have you finished your homework??
- No, not already.
［正］ - Have you finished your homework??
- No, not yet.
［析］ 仍然有三个英文字可以表达它们是already， yet 与 still。 要注意的是 already经常用于肯定句中，如The bus has already gone。 而yet 多用于疑问句和否定句中，如：Have you finished your homework yet? 而still则常用于主语与谓语动词之间，如：We still can't decide what to do. 但也有时用于be 动词之后，如：He is still here.
［误］ He is very higher than I am.
［正］ He is much higher than I am.
［析］ much可以用来修饰比较级，而very则用来修饰形容词原级，如：I'm very tired.
［误］ - Can I walk to the station??- You'd better not. It is very far.
［正］ - Can I walk to the station??
- You'd better not, It is a long way.
［析］ for一般用在疑问句与否定句中，如：How far is it from here to the station? 又如：It isn't far.
［误］ I've ever been to America.
［正］ I've been to America once.
［析］ once 多用于肯定句，而ever则用于疑问句，否定句，及条件状语从句中，如：Have you ever been to London?
［误］ - Could you pass the exam this time??
- No, I am not afraid so.
［正］ - Could you pass the exam this time??
- No, I'm afraid not.
［析］ 在肯定的答语中我们可以用so来代替上句所讲的事件，如：Do you think she is a good student? Yes I think so, /I hope so, /I believe so/ I'm afraid so.但在否定的答语中，英语口语的习惯用法则有所不同，如，I don't think so 而在hope, belive 与 afraid后则常用not， 如：I hope not.
［误］ She didn't work enough hard, so she couldn't pass the exam.
［正］ She didn't work hard enough, so she couldn't pass the exam.
［析］ enough 可以作名词用，如：Enough has been said for how to learn English well. (对于如何学好英语已经讲的足够多了。) 另外它可以作为形容词，如：I have enough money (or money enough) to buy this dictionary. 注意 enough作为形容词时即可放于名词前又可放于名词后，在初中范围的考题中多用于名词之前。如果enough 作为副词用，那么它一定要放在被修饰的形容词或副词之后。
［误］ You can't be very careful.
［正］ You can't be too careful.
［析］ 此句话的含意是你如何小心也不过分。too…to的用法是"太……以至于不能作某事"。但在实际应用时也常常将后面的to省去，如：It is too expensive for me.那对我来讲是太贵了。
［误］ He is good past fifty.
［正］ He is well past fifty.
［析］ well 作为副词用时除用于"好"之外还有"大大地、远远地"，等意。往往有人对下面两句的对或错有争议；
He is well.
He is good.
其实这两句都是正确的表达法，只不过其含意不同。He is well是"他身体不错"，而He is good 则为"他是个好人"。
* like 作为介词，其意为"像"，应用于 look like, be like, sound like, 其后要加宾语。而 ?alike? 是形容词，或副词，如: You and I think alike. The twins are dressed alike。 但 alike 仅作表语而不能用于名词前作定语。
［误］ Who is taller of the two?
［正］ Who is the taller of the two?
［析］ 两者的比较级之前要加定冠词。
［误］ I have less books than Tom.
［正］ I have fewer books than Tom.
［析］ less 是 little的比较级，而fewer是few的比较级。less后应加不可数名词而fewer后是可数名词。
［误］ There are three girls in my group. The cleverer is Mary.
［正］ There are three girls in my group. The cleverest is Mary.
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