1.
play one's cards right/well
办事高明，做事有心计
2.
Nothing is so easy but it is difficult if you do it unwillingly .
做事不情愿，易事也难办。
3.
play one's cards poorly
办事不高明，做事不慎重
4.
Do business, but be not a slave to it .
宁做事之主，不为事之奴。
5.
In for a penny,in for a pound.
做事一开头，就要做到底；一不做，二不休。
6.
To do what a letter ask to is do.
做信中要求做的事。
7.
We must do all that is to be done.
我们必须做该做的事。
8.
What must be done, must be done.
必须做的事情就必须做。
9.
promise to do what is needful
答应做必须做的事.
10.
I'll do what I must.
我必须做我该做的事。
11.
put a quart into a pint pot
1. 做不可能做到的事
12.
How would they scorn to do what you have done.
他们不屑于做你做的事。
13.
Please proceed with what you were doing.
请继续做你正在做的事。
14.
persuade sb to do/not to do sth
说服某人做[不做]某事
15.
Cajole(sb.)into [out of] doing sth.
诱（人）做[停止做]某事
16.
encourage sb. To do sth.
鼓励某人(做某事)
17.
He that has patience may compass anything.
有耐心的人事事做得到
18.
turn one's hand to sth.
承担某事，着手做某事