1. may (just) as well do sth.
may as well do sth. 表示“不妨；倒不如”，用来提出建议。如：
We may as well have a try and see if it can be done.
我们不妨试一试，看看能否办成。
There is nothing to do, so I may as well go to bed.
没什么事可做，我还是上床睡觉好了。
[注意]
might as well也可表示“不妨”，但语气更委婉一些。其也是may as well的过去时形式。如：
Since she had come up to London, she might as well speak her mind.
既然她已来到了伦敦，她还不如说出真心话。
2. As far as I know ．．．
as far as 表示“就……而言；从……来看”。as far as I know就我知道的而言；as far as I can see就我能看到的而言；as far as they are
concerned 就他们而论；as far as the eye can reach 就视力所及。如：
As far as I know, he isn't coming to the party.
就我所知，他不会来参加这次聚会。高中英语重点句型归纳
As far as I am concerned, I cannot object to your marriage.
就我个人而言，我不反对你们的婚事。
知识拓展
as far as还可表示“到某一指定地点；一直到（某地）”。如：
They walked as far as the foot of a mountain.
他们一直走到山脚下。
I'll see you off as far as the airport.
我将一直送你到飞机场。
[高考示例]
_______ I can see, there is only one possible way to keep away from the danger. (北京2004春)
A. As long as B. As far as C. Just as D. Even if
（注意：斜体部分为最佳选项。）
3. That sort of thing.
That sort of thing. 独立使用时，为一省略结构。如：
Home is happiness and sweetness. That sort of thing（=Home is that sort of thing）.
家庭意味着幸福、温馨，就是这个样子。
这一结构通常应该是and that sort of thing，表示“等等诸如此类的事”。如：
The store sells socks, gloves, caps and that sort of thing.
这家商店经营袜子、手套、帽子等同类商品。
