Conditional sentences – type I

1. Use

It is possible to fulfil a condition which is given in the if-clause.

2. Form

if clause main clause
Simple Present will-future
infinitive
Modal + infinitive

3. Examples

if clause main clause
If I study, I will pass the exams.
If you see John tonight, tell him to e-mail me.
If Ben gets up early, he can catch the bus.

The if-clause can be at the beginning or at the end of a sentence.

if clause main clause
If I study, I will pass the exams.
main clause if clause
I will pass the exams if I study.