Conditionals

In English there are four conditionals. In the following lines we will analize them: the use and the form.


0 Conditional: 

Use:  When the result of the condition occurs 100% of the times, for example in scientific facts.

Form: If + present simple, .... present simple

Example: If you heat ice, it melts.



1st Conditional:

Use: When there is a real possibility that this will happen.

Form: If + present simple, ... will...

Example: If you break the painting, I will tell mum.


2nd Conditional:

Use: There is not a real possibility that this will happen.

Form: If + past simple, ...would...

Example: If I were rich, I would buy a helicopter.


3rd Conditional:

Use: When we talk about something in the past that did not happen.

Form: If + past perfect, ... would have + past participle...

Example: If I had been rich, I would have bought a helicopter. 



EXERCISES


Source:https: //www.englishclub.com/grammar/verbs-conditional_1.htm, https://www.ego4u.com/en/cram-up/tests/conditional-sentences-3