The document discusses different types of conditional sentences in English. It provides examples for zero conditional, first conditional, second conditional, third conditional, mixed conditional, and inverted conditional sentences. The types of conditional sentences are differentiated based on the time frame they refer to (present, future, past) and their likelihood or possibility.

2. If + S + V1, S + V1
o Facts
Examples:
If water boils, it changes into steam.
If you sit in the sun, you get burned.

4. If + S + V1, S + will/going to + V1
o Event that are likely to happen in the
future
Examples:
If she wakes up now, she’ll be on time.
If you watch this movie, you are going to love them.

5. If + S + V1, imperative+ V1
oA command or begging
Examples:
If you finish watching TV, turn it off.
If he comes, tell him the truth.

7. o It talks about things in the present.
o It is possible but very unlikely, that the
condition will be fulfilled.
If + S + V2, would + V1

8. Examples:
If I were you, I would marry her.
If he knew the answer, he’d tell you.

10. o It talks about the past.
o It's used to describe a situation that didn't
happen, and to imagine the result of this
situation.

11. o IF Clause -If + Subject + Had + Past
Participle.
o Main Clause -Subject + Modal + Have +
Past Participle.

12. If + Subject + Had + Past Participle.
o If she had studied, she would have passed
the exam (but, really we know she didn't
study and so she didn't pass)
o If I hadn't eaten so much, I wouldn't have
felt sick (but I did eat a lot, and so I did feel
sick).
o If we had taken a taxi, we wouldn't have
missed the plane

13. Subject + Modal + Have + Past
Participle.
• She wouldn't have been tired if she had
gone to bed earlier.
• She would have become a teacher if she
had gone to university.
• He would have been on time for the
interview if he had left the house at
nine.

15. If + Past Simple , would have V3
It is impossible to happen in the
present , but it affects the past
Example :
•If she stayed here now, she would have seen her
father.
•If they were there, he wouldn’t have been alone.

16. If + Past perfect, would + V1.
It is impossible to happen in the
past, but affects the present.
Example :
•If you had listened to me, you wouldn’t be in trouble
now.
•If she had read her book, she wouldn’t fail the test.

17. Inversion of If Clause
Zero Conditional : when
Examples:
•If water boils, it changes into steam.
When water boils, it changes into steam.

18. Inversion of If Clause
First Conditional : Should
Examples:
 If she see David, she’ll pass on the message.
 If she SHOULD see David, she’ll pass on the message.
 Should she see David, she’ll pass on the message.

19. Inversion of If Clause
Second Conditional : Were
Examples:
•If I were you, I would tell him the truth.
Were I you, I would tell him the truth.
•If I went to Tokyo, I would go to Disneyland.
Were I to go to Tokyo, I would go to Disneyland.

20. Inversion of If Clause
Third Conditional : Had
Examples:
•If he had worked hard,… Had he worked hard,…
•If she had came here,.... Had she came here,….

21. • https://www.englishclub.com/grammar/verbs-
conditional_4.htm
• http://www.learnenglish-
online.com/grammar/thirdconditional.html
• Book: ตะลุยโจทย์ grammar 1,500 ข้อ
• http://www.perfect-english-grammar.com/first-
conditional.html
• https://www.englishclub.com/grammar/verbs-
conditional_5.htm