First conditional (also called if-clauses type 1)
FORM: A first conditional sentence consists of two clauses, an "if" clause and a main clause:
|if clause||main clause|
|If you study hard,||you will pass the test.|
USE: The first conditional is used to talk about things which are possible in the present or the future - things which may happen.
Second conditional (also called if-clauses type 2)
FORM: Like a first conditional, a second conditional sentence consists of two clauses, an “if” clause and a main clause:
If I had a million dollars, I would travel around the world.
|IF clause:||if + subject + simple past verb|
|main clause:||subject + would + verb|
*Note that this "simple past" form is different in the case of the verb BE. Whatever the subject, the verb form is "were", not "was": If I were rich, I'd buy a big house.
USE: The second conditional is used to talk about things which are impossible, unlikely or imaginary.
Types 1 and 2 mixed exercises: