This document discusses conditional sentences in English grammar. There are four types of conditional sentences: zero, first, second, and third conditional. The zero conditional describes real situations with a 100% probability using the present simple tense. The first conditional describes likely future situations with a 50% probability using the present simple and will/may/can. The second conditional describes unlikely situations with a 10% probability using the past simple and would. The third conditional describes impossible past situations with a 0% probability using the past perfect and would have. Examples are provided to illustrate the different conditional sentence structures and tenses used.

1. English Grammar
Conditional Sentence
BY
PARVES SIKDER

2. Definition
''Conditional sentence is used to talk about
real or unreal situations whereas real
conditional sentence describes about real life
situation and unreal conditional sentence
describes about unreal,imaginary
situations''.....
Example: If you want, I'll help you.
Were I a bird,I would fly**.

3. 2 Parts of Conditional Sentence
● ''If Clause''
● ''Result Clause''
*** ''If Clause'' is used to show ''Condition'' of a sentence.
*** '' Result Clause'' is used to show result of ''If Clause''
{Note}: ***If Clause ........(,)....... rest of the sentence (Result
Clause).
*** Result Clause... ( no comma)...If Clause.

4. There are four types of
Conditional sentence
1.Zero Conditional
2.First Conditional
3.Second Conditional
4.Third Conditional

5. Probability and Time of
Conditional sentence
Probability Conditional Time
100% Zero Any time
50% First Future
10% Second Future
0% Third Past

6. Structure of Conditional Sentence
Conditionals If Clause(Condition) Main Clause(Result)
Zero Conditional If+Sub+Present Simple Sub+Present Simple
First Conditional If+Sub+Present Simple Sub+Will/Can/May/Must+
Base verb
Second Conditional If+Sub+Past Simple Sub+Would+Base verb
Third Conditional If+Sub+Past Prefect Sub+Would have+ verb
v3(past participle)

7. Examples
● If people eat to many sweets,they get fat.(Zero Conditional-100%)
●
If Jolly doesn't wear a hat,she gets sunstroke.(Zero Conditional)
● You'll see something if you fear something.(First Conditional-50%)
● If winter comes,can spring be far behind?..(First Conditional)
● If I studied,I would pass in the exam.(Second Conditional-10%)
● If were a teacher,I would teach you English.( Second Conditional)
● If the Titanic hadn't hit an iceberg, it wouldn't have sunk.(Third Conditional-0%)

8. ● If it rains tomorrow, I won't go out.(First Conditional)
● I won't help you if you don't help me.(First Conditional)
● I'll tell the teacher if you cheat again.(First Conditional)
● If I went to moon,I would build a house there.(Second Conditional)
● I'd be very tired if I talked for three days.(Second Conditional)
● Mr Jon would have gone if his company hadn't organized a
meeting.(Third Conditional)

9. Exercise
● Abir …. (go) to Dhaka next month if he …. (get) a cheap flight.
● What type of music they …. (to play) if they …. (to have) a disco?
● If Imran …. (come) home early, he ….(sit) in the room.
● If they …. (not have) now, they ….(miss) the bus.
● If I …. (be) more careful, I …. (not break) the glass.
● I …. (tell) him about the party if I …. (see) Noman.
● It …. (melt) if you …. (put) ice on the water.
[Remember] : *** If Clause-(to be verb)=were.
*** If+were=were (may use) {only second conditional}
Example: If I were Shakespeare,I would write ''Hamlet''
Were I Shakespeare ,I would write ''Hamlet''

10. Thank You