When I am rich, I will buy a car
When he is rich, he will buy a car
If I have time, I will come here
If he has time, he will come here
As soon as I have done it, I will let you know
As soon as he has done it, he will let me know
Once I'm free, I will take a trip abroad
Once he is free, he will take a trip abroad
Unless I come back tomorrow, he will leave
Unless he comes back tomorrow, I will leave
Does these sentences correct grammatically?