use either present simple or future simple
1.If he (to come) i (to give) him this message.
2.I can't tell you when they (to start) the new project.
3.Kate (to help) you with your homework as soon as she (to do) her own.
4.I (to ask) you a few questions before you (to go).
5.I wonder if we ever (to see) each other again.
6.Nick (to tell) us about the accident when he (to have) time.
7.If they (need) your advice, they (to get) in touch with you.
8.The patient (to feel) better as soon as he (to take) this medicine.
9.The interpreter (to translate) whatever you (to say).
10.I (to let) you know when i (to book) the tickets.