接続詞 as の慣用句

as yet《通例否定文で》未だ（～ない）、今のところは
- an as yet unpublished report 
- As yet little was known of the causes of the disease.

as if / as though　まるで～のように

as it is（文頭・節頭）ところが実際は／（文中・文末）もうすでに
- We were hoping to finish it by next week—as it is, it may be the week after.
- I would have liked to take a little rest if all the others had agreed. As it was, we kept walking.
- I can't help—I've got too much to do as it is (= already).

as it were《やや古風》〔文中・文末〕言わば〔仮定法のため were が使われている〕 =so to speak〔一般的〕, in a way, in a manner of speaking, 《口語》so to say
- Teachers must put the brakes on, as it were, when they notice students looking puzzled. - Suspects receive extra points, as it were, for certain characteristics, such as a law degree. (Seattle Times, 2002) 

as well (as ~)　〜も同様に〔やや固い言い方〕
- Will your husband be attending as well?
- They sell books as well as newspapers.

as you do　誰もがするように
- He smiled and I smiled back. As you do. 

as is《米話》そののままで、《法》(商品が)傷もの、現物で
- I bought the car as is, so the seller was within his legal rights to refuse to repair it when it broke down after two days. (Wiktionary) 

as and when　〜すれば〔未来の条件〕

- We'll decide on the team as and when we qualify. 

- I'll tell you more as and when (= as soon as I can).