This document discusses different types of conditionals. Type 0 conditionals are factual statements. Type 1 conditionals are predictive about present or future events. Type 2 conditionals are hypothetical situations contrary to present facts. Type 3 conditionals are counterfactual situations contrary to past facts and used for regret or criticism. It also discusses inversion conditionals, including Type 1 with should + subject + verb, Type 2 with were + subject + verb/to + verb, and Type 3 with had + subject + past participle verb. Negation is formed with not coming after the subject.

2. TYPE 0 (factual conditionals)
Structure : If + simple present,simple present
• Scientific facts
• General truths
• Imperatives
 Bees die if they sting someone
 If the tempature falls below 0°C , water turns into ice
If you need help,call me

3. TYPE 1 (predictive conditionals)
Structure : If + present forms , future forms/modal verbs (can/may/might)
• real present
• likely to happen in the present or future
 If Dad doesn’t work at the weekend,we will go trekking
 If you finish your meal,you can play on the computer
 If I work overtime this week,I may take a day off

4. TYPE 2 (hypothetical conditionals)
Structure : If + past simple/past continuous , would/could/might + V1
• imaginary situations contrary to facts in the present
• giving advice
 If I had time,I would take up a sport
 If it weren’t raining,we could sit in the garden
 If I were you,I would talk to my parents about it

5. TYPE 3 (counterfactual conditionals)
Structure : If + past perfect/past perfect continious , would/could/might + have + V3
• imaginary situations contrary to facts in the past
• regret
• critism
 If I had studied harder,I could have passed the test
 If he hadn’t been acting so foolishly,he wouldn’t have been punished
 If I hadn’t been ill yesterday,I would have taken the exam

7. 1) Type 2 + Type 3
 He isn’t a good student.He didn’t study for the test
 I didn’t go to the concert because I don’t like rock music

8. 1) Type 3 + Type 2
 She worked hard yesterday.She is tired now
 Your mother is shouting at you now because you broke her antique vase

10. Type 1
Structure : Should + subject + V1 , main clause
 If you eat too much,you will put on weight
 If Peter comes,tell him to wait

11. Type 2
Structure (for “be” verb) : Were + subject + object , main clause
Structure (for other verbs) : Were + subject + to + V1 , main clause
 If you were here,we could do many things together.
 If the Browns lived another city,we couldn’t see them so often.

12. Type 3
Structure : Had + subject + V3 , main clause
 If she had taken a taxi,she wouldn’t have come home late.
If I had asked him,he would have helped me.

13. To make it negative,we use “not” and it
always comes after the subject.
 Should Karen not call us tomorrow,we will go to the concert without her.
 Were Walter not rich,he wouldn’t be able to afford such a luxurious car.
Were Linda not to watch the series,she wouldn’t know all the details.
 Had she not taken a taxi,she would have come late.

14. SUMMARY OF INVERSION
1. Type 1 : Should + subject + V1 , main clause
2. Type 2 :
3. Type 3 : Had + subject + V3 , main clause
“not” always comes after the subject.
a) Were + subject + object , main clause (for “be” verb)
b) Were + subject + to + V1 , main clause