When it comes to ... 关于，说到
eg. When it comes to happiness, people's opinions vary.
as 随着，接 句子
with 随着，接 名词性短语
Where there is a will,there is a way. 有志者，事竟成
eg. As the saying goes, "Where there is a will, there is a way"
since 和 as 后一般跟明显的、双方都知道的事实。
Since/As it is raining heavily, we'd better stay at home.
now that 因为
eg. The children looked light-hearted now that the final exam was over.
in that 因为
eg. I'm in a dilemma in that I have to choose from two interesting and well-paid jobs.
连词：because, as,since 等 ， + 句子
短语介词：because of,due to,owing to 等 , + 名词
Because of his absence,the conference was cancelled.
Because he was absent,the conference was cancelled.
so...that,such...that, 非常。。。，因此。。。
It is such an interesting app that I browse it multiple times a day.
so that
The app is very interesting so that I browse it multiple times a day.
so that, in order that 为了... + 完整句子
I study English hard so that I could read Shakespeare in the original.
in order to 为了... + 动词原形(主语一致)
I decide to take the entrance examination in order to have a promising future.
if 用法(主将从现)
If you need money, I will lend you some.
suppose/supposing(that) 如果，假如
as/so long as 如果，只要
proviede/providing(that) 如果，以。。。为条件
on condition that
although,though 尽管、即使（although 较正式）
while 尽管，虽然
While there was no conclusive evidence, most peole considerd him guilty.
even if/though 即使
Even if you have dark skin, you still need protection from the sun.
as 尽管， 让步状语从句，一般要倒装
Young as he is, he has made great achievements.
Although he is young, he has made great achievements.
连词：although/though 尽管 + 句子
(短语)介词：despite,in spite of 尽管 + 名词
Desipte/In spite of pur efforts to save the school, the local goverment decided to close it.
Although we made efforts to save the school, the local goverment decided to close it.
as 以......方式（方式状语）
When in rome, do as the romans do. 在罗马，就做的像罗马人一样。
as if 仿佛......似的
as though 好像......似的
He treats her as if/ as though he doesn't care about her. （时态一致，表示事实，确实不在乎）
He treats her as if/as though he didn't care about her.（时态不一致，表示虚拟语气，与事实相反，其实是在乎的）
（just）as...,so... 正如，就像
Just as/As water is to fish,so air is to man. 人们离不开空气，正如鱼儿离不开水。
Just as/As water is to fish,so language is to communication. 语言对沟通很重要。
as...as...（同级比较，和......一样）
He is as courageour as his father(is). 他和他爸爸一样有勇气。
The task is not as/so difficult as you assume. 这个任务不是你想象的那么难。（否定对比）
than 比。。。(同类比较)
I am more reliable than he (is). 我比他更靠谱
He is less reliable than I.
The weather of the South is wetter than that of the south.
状语从句省略句型
Though he has a lot of money, he doesn't have many friends.
Though having a lot of money,he doesn't have many friends.
If it is heated, water will be turned into vapor.
if heated, water will be turned into vapor.
lose momentum 失去上升势头
gain momentum 上升势头
rose dramatically 急剧上升
be content to 对......很满意，乐于做......
flexibility 灵活性
While their parents were content to work long hours,young people value flexibility.
虽然他们的父母甘愿长时间工作，年轻人重视（工作时间）灵活性
fail to do sth. 未做成。。。
fellow beings 同类
at all time 随时，一直
dip 蘸,沉浸于
for a while 持续一段时间