If you wish really hard, maybe you'll get what you want.
心诚则灵。
You may come if you wish.
如果你愿意可以来。
Give my good wishes to the family.
请替我向全家致意。
I have some information you may be able to use.
我有些可能对你有用的信息。
The last time I saw him was in May.
我上次见到他是在五月份。
Someone might find out, and that would never do.
也许有人会发现，那是绝对不行的。