Conditionals are sentences with two clauses - an 'if clasuse and a main clause'. There are four basic conditioanal structures that are uded in English:
- Zero Conditional
- First Conditional
- Second Conditioanal
- Third Conditioanal
|Zero Conditional||What is always true or usually happens, or what is advised in this situation.|
|If||+Present Simple||+ Present Simple|
|If||you have a ticket||you go straight in.|
|If||you stand in the rain||you get wet.|
|If||you see an accident||call an ambulance.|
|The 'if' in the above sentences can usually be replaced by 'when' without changing the meaning.|
|First Conditional||Something that will possibly happen in the future.|
|If||+Present Simple||+Will + Infinitive|
|If||I see an accident||I will call a doctor.|
|If||it rains tomorrow||the picnic will be cancelled.|
|If||you make an apple tart||Dad will eat it.|
|Note : Sometimes we use can or may instead of will.|
For example : If you finish your vegetables, you can have a dessert.
|Second Conditional||Imaginary events that are probably not going to happen.|
|If||+Past Simple||+Would + Infinitive|
|If||I saw an accident||I would call a doctor.|
|If||he had more money||he would buy a new car.|
|If||she worked harder||her results would improve.|
|Note : Sometimes we use could or might instead of would.|
For example : If we invited the author, he might come.
If we ordered a larger quantity, we could ask for a reduction.
|Third Conditional||Something that did not happen, and the reaction or result you imagine |
if it really had happened.
|If||+Past Perfect||+Would + have + Past Participle|
|If||I had seen the accident||I would have called a doctor.|
|If||he had read the instructions||he would have assembled it faster.|
|If||she had stayed in Paris||she would have improved her French .|