10 graders: Conditionals 1, 2 and 3

 As a warm-up I have this short video here for you about conditionals Types 0, 1 and 2: 

http://www.youtube.com/watch?v=CFwVccec1K4&feature=related

Type I – Probable situation
If + Present Simple + Future “will” + Infinitive
or
Future “will” + Infinitive + If + Present Simple 

Examples:

If I go to the supermarket, I’ll buy some bread.
I won’t go to the beach if it rains.


Type II – Improbable situations, give advices.


If + Past Simple + Conditional “would” + Infinitive
or
Conditional “ Would” + infinitive + if + Past Simple 



Examples: 

If I were you, I wouldn’t speak to them again.
I wouldn’t speak to them again if I were you.


Type III – express regret to something you have done; impossible, imaginary situations.


If + Past Perfect + would + have + Past participle
or
Would + have + past participle + if + past perfect


Examples:

If I had studied harder, I wouldn’t have failed the exam.
I wouldn’t have failed the exam if I had studied harder. 

Have a look at this link:
http://www.ego4u.com/en/cram-up/grammar/conditional-sentences