Thanks for the help.

Another quick translation question:

We have to hurry or we'll be late for the concert.
Нам надо спешить но мы опаздаем на концерт. Is the first verb imperfective and the second perfective? Is there a rule that you use an imperfective infinitive after надо?

Thorbert--no there are no answers in the book. I'm muddling through with your help.

Z