Do it yourself ─ I don't have time.
你自己做吧——我没时间。
I could do it now, if you like.
如果你愿意的'话，我现在就可以做这事。
I have some work for you to do.
我有些事要你做。
There's only one sure way to do it.
做这件事只有一个保险的办法。
You don't want to do it like that.
你不应那样做。
