1. as … as idm (=used when you are comparing two people, things, situations etc)ad./prep.像…一样…
2. as for sb/sth idm (= used when you are starting to talk about someone or something new
that is connected with what you were talking about before)prep.至于，关于
3. as to sth/as regards sth idm (=used when you are referring to sth)prep.至于，关于
4. as if/though idm (=in a way that makes it seem that something is true or that something is happening)ad.好象
5. as it is idm (=a) because of the situation that actually exists - used when that situation is different from what you expected or need: They hoped to finish the kitchen by Friday, but as it is they'll probably have to come back next week. b) already: Just keep quiet - you're in enough trouble as it is.)ad.实际上，事实上
