Material Unit 3

Conditional sentences have two clauses: 

- the conditional clause- if-clause (starting with if)

- the result clause (the main clause)

Example: If the temperature drops to  0ºC,  water turns  into ice.

The conditional clause can also start with unless, meaning if not.

Example: Unless it rains, we'll meet you in the park. // If it doesn't rain, we'll meet you in the park.

The order of the two clauses are flexible, but we must use a comma after the conditional clause when it comes first.

Example: If I trained harder, I'd be a lot fitter.

We distinguish different types of conditionals: zero, first, second and third according to the degree of probability that they express.