Типы условных предложений

If you want a thing well done, do it yourself
If you run after two hares, you will catch neither.
If a man deceives me once, shame on him; if he deceives me twice, shame on me.
All would be wise if things were to be done twice.
If you wish for peace be prepared for war.
Proverbs

Выражает реальное или возможное условие в настоящем или будущем
If + Present Simple, Simple Future (will + Infinitive)
First Conditional

What will happen if…?

If you walk under the ladder, you will have bad luck.
If you break a mirror, you will have seven years `bad luck.
If you see a small spider, you will get a lot of money.
If a black cat crosses your path, you will have good luck.
If a rooster crows when he goes to bed, he'll get up with rain on his head.
Superstitions

Выражает нереальное или воображаемое условие в настоящем или будущем
If + Past Simple, would + Infinitive
Second Conditional

If someone gave you $100, what would you buy?
If you won a ticket for anywhere in the world, where would you go?
If you lost your home key, what would you do?
If you met a famous pop star , what would you say to him/her?
If you saw someone robbing a bank, what would you do?
If ifs and ands were pots and pans...

Выражает нереальную ситуацию, относящуюся к прошлому, которая не произошла, упущенную возможность
If + Past Perfect, would + Present Perfect
Third Conditional