I have to sign copies of my book for a lot of people
我还必须为许多人在我的书上签名
She will go into business when she likes to.
她想经商时就会去经商。
I'm not sure. I ought to do some studying, as I've got masses of work to do, but I think I'll be too tired. Maybe I'll just watch the news on television and go to bed early.