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.

1.comes* т.к. he

Ну там по окончаниям разберёшься,где he,she,it +s

Спешила просто

1. If he comes, I'll give him this message.2. I can't tell you when they'll start the new project.3. Kate will help you with your homework as soon as she does her own.4. I'll ask you a few questions before you go.5. I wonder if we'll ever see each other again.6. Nick will tell us about the accident when he has time.7. If they need your advice, they'll get in touch with you.8. The patient will feel better as soon as he takes this medicine.9. The interpreter will translate whatever you say.10. I'll let you know when I book the tickets.

If he come,I will give...,(это через conditional)When they will start,Kate will help you...as soon as she do(Kate helps,as soon as she will do)I'll ask youWe will everWill tell,if he has timeNeed,will getWill feel,takeWill translate,whatever you say(или translate,say)I'll let you know when i book