10. already一般用于肯定名，也可用于预料能得到肯定回答的疑问句中，表示某事已发生；yet一般用于否定句或疑问句中位于句末，意为“还，已经”；still一般用于肯定句，也可用于疑问句，意为“仍然，还”。Eg： I have already read the book./ We
haven’t made speeches yet./ Is my skirt dry yet?/ I still hope to get some
advice from you on my studies.
11. faily，rather，quite
A．三者都可以修饰形容词和副词，都有“相当”的意思，但failry词义最弱，quite稍强，rather最强。Fairly一般表示肯定、褒义，rather有时表示否定、贬义。It is fairly cool today. It is rather cold today.
B、quite和rather可以修饰动词，而fairly不能。 I don’t quite understand what you said./
I rather like the song.
12.
so，neither，nor
so可用在“so+助动词+主语”的倒装结构中，表示“也”，位置在助动词前，so的这种用法只能在肯定句里；在否定句中用neither或nor，结构相同，表示“也不”。
He has
seen the film. So have I .
Jim
doesn’t like the novel. Neither (Nor) does Linda.
13.
ago, before
A “时间段+ago”表示从现在往前推算的“一段时间以前”，而“时间段+before”表示从过去某时刻再往前推算的“一段时间以前”。因此，前者常与一般过去时连用，后者常与过去完成时连用。He bought a violin a week ago. From his letter I knew that he had
bought a violin a week before
B before可表示不确定的过去，而ago则不能： Have you been there before?
14. 像afraid, alive, awake, asleep,
alone以“a”开头的形容词，一般不能用very修饰。
15.
deep与deeply都可作副词，但意义不同：deep指的是深浅的“深”，如：dig deep。Deeply的意思是“涂地、深刻地、深厚地”，有引申含义。如：We are deeply moved by his deeds.(还有high，highly)
16. not是副词，不能直接修饰名词，no是形容词，能位于名词前作定语，有时no=not any。如： I have no brothers=I have no
any brothers