Looking on the internet deeply has found these results:

If I want to pass my exam, I will have to study harder. is the most popular phrase on the web.

If I want to pass my exam, I would have to study harder. 1142,000,000 results on the web	If I want to pass my exam, I will have to study harder. 1173,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Just not well enough to pass my exams. I have to pass my exams next month. If you want to pass the exam, this is the most important question. Me too, if I ever pass my exams. I started when I realized I'd never pass my exams if I worked nights. Me too, if I ever pass my exams. I just want to pass my exams. I awake early because from today I must do several hours on the bike, if I want to pass through this place quickly as possible.	Just not well enough to pass my exams. I started when I realized I'd never pass my exams if I worked nights. Me too, if I ever pass my exams. Me too, if I ever pass my exams. I awake early because from today I must do several hours on the bike, if I want to pass through this place quickly as possible. I just want to pass my exams. If you want to pass the exam, this is the most important question. I have to pass my exams next month.

If I want to pass my exam, I would have to study harder.

1142,000,000 results on the web

If I want to pass my exam, I will have to study harder.

1173,000,000 results on the web

More popular!

Just not well enough to pass my exams.
I have to pass my exams next month.
If you want to pass the exam, this is the most important question.
Me too, if I ever pass my exams.
I started when I realized I'd never pass my exams if I worked nights.
Me too, if I ever pass my exams.
I just want to pass my exams.
I awake early because from today I must do several hours on the bike, if I want to pass through this place quickly as possible.

Just not well enough to pass my exams.
I started when I realized I'd never pass my exams if I worked nights.
Me too, if I ever pass my exams.
Me too, if I ever pass my exams.
I awake early because from today I must do several hours on the bike, if I want to pass through this place quickly as possible.
I just want to pass my exams.
If you want to pass the exam, this is the most important question.
I have to pass my exams next month.