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|Zero||if + Present Simple||Present Simple||general truths|
|If water reaches 100 C, it boils.|
|1st||if + Present Simple||Future Simple /modal imperative||sth likely to happen in the future|
|If I see Mary, I will tell her you came over.
If I see Mary, I may tell her you came over.
If you see Mary, tell her I came over.
|2nd||if + Past Simple||would / could / might + bare infinitive||unreal situation in the present|
|If I had money, I would buy a car.
If I were you, I would talk to her. (advice)
|3rd||if + Past Perfect||would / could / might + have + past participle||unreal situation in the past|
|If I hadn’t driven so fast, I wouldn’t have crashed.|
- Instead of if we can use provided/providing (that), suppose/supposing (that), on condition that, in case (of)
- In the 2nd type we always use were and never was.
- if + negative form = unless + affirmative form
e.g. If you don’t study hard, you will not pass the test
Unless you study hard, you will not pass the test.
|If + Past Simple (2nd Conditional)||would / could / might + have + past participle (3rd Conditional)|
|e.g. If I were rich, I would have bought that house last year.|
|If + Past Perfect (3rd Conditional)||would / could / might + bare infinitive (2nd Conditional)|
|e.g. If I had studied harder, I would be a doctor now.|
1st: If you should see him, tell him to call me.
Should you see him, tell him to call me.
2nd: Were I you, I would call the police.
But for you (If it weren’t for you), I wouldn’t know what to do.
3rd: Had I studied , I would have passed the test.
But for Jim (If it hadn’t been for Jim), we would have crashed.
- If you will come this way please, I’ll show you to your room. (polite / formal request)
- If you would like to wait here, I’ll call the manager. (more formal)
- If he were to offer you the job, would you accept it?