Conditional sentences are used to describe things that are not real yet, or that will never be real.
Conditional sentences consist of two parts: the main clause and the if-clause. The if-clause expresses a condition, on which the main clause becomes true or would have become true in the past. There are three different types of conditional sentences:
Type I: real conditions "If the weather is good tomorrow, we will go hiking."
Type II: unreal conditions "If I was a bird, I would fly in the sky."
Type III: unreal conditions in the past "If you had told me before, I would have helped you."
Be careful: NEVER USE "WOULD" IN AN IF-CLAUSE!
To find out more about how to form conditional sentences, take a look at the sub-pages.
To gain a general understanding of which type is which, try out the following exercise! If you find the exercise too difficult right now, first read through the other pages and then return to this exercise.