if clause 123 for m.5/1-9
TRANSCRIPT
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TYPE 1 : Future possible/Possible Condition expresses a possibility for the PRESENT or FUTURE
ความเป็�นไป็ได้�ในอนาคต เป็�นการคาด้การณ์�ล่�วงหน�าว�าเหต�การณ์�หร�อการกระทำ�าน��นอาจจะเก ด้ขึ้"�นใน
อนาคต(เง�#อนไขึ้ทำ$#เป็�นไป็ได้�) IF + PRESENT SIMPLE + FUTURE SIMPLE
If+ S+V1, S+ willwill/ shall/may/can +V infinitive
Example: She can do it if someone helps her. If the weather is nice, we will go to the park.
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If-ClauseIf-Clause Main ClauseMain Clause
Present SimplePresent Simple
Future SimpleFuture SimpleorInfinitiveInfinitiveorModal + InfinitiveModal + Infinitive
FormationFormation
ExamplesExamples
If-ClauseIf-Clause Main ClauseMain Clause
If I studystudy, I will passwill pass the exams.
If you see see John tonight, telltell him to e-mail me.
If Ben gets up gets up early he can catch can catch the bus.
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They will visit Eiffel Tower if they go to France.
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If she tries hard, she will succeed.
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TYPE 2: Present-UnrealPresent-Unreal / / Impossible ConditionImpossible Condition
IMPROBABLE OR UNREAL SITUATION in the present or future.
• เง�#อนไขึ้ทำ$#ตรงก�นขึ้�ามก�บความเป็�นจร งทำ$#เก ด้ขึ้"�นเง�#อนไขึ้ทำ$#ตรงก�นขึ้�ามก�บความเป็�นจร งทำ$#เก ด้ขึ้"�นในในป็&จจ�บ�นป็&จจ�บ�น//อนาคอนาคต กล่�าวค�อ เป็�นเง�#อนไขึ้ทำ$#เหต�การณ์�น��นไม�ม$ทำางเก ด้ขึ้"�นได้�แน�ๆ ต กล่�าวค�อ เป็�นเง�#อนไขึ้ทำ$#เหต�การณ์�น��นไม�ม$ทำางเก ด้ขึ้"�นได้�แน�ๆ เป็�นเร�#องทำ$#สมม�ต ขึ้"�นมาล่อยๆเทำ�าน��น เป็�นเร�#องทำ$#สมม�ต ขึ้"�นมาล่อยๆเทำ�าน��น ((เง�#อนไขึ้ทำ$#เป็�นไป็ไม�ได้�เง�#อนไขึ้ทำ$#เป็�นไป็ไม�ได้�MAIN CLAUSEIF CLAUSE
Subject + would + V.1If + past simple If I knew her name, I would tell you. (ถ้�าฉั�นรู้ �ชื่��อเธอ ฉั�นก็�น�าจะบอก็คุ�ณ) [จรู้�งๆ แล้�วไม่�รู้ �จ�ก็ชื่��อเธอ]She would be safer if she had a car. (เธอน�าจะปล้อดภั�ยก็ว�าน%& ถ้�าเธอม่%รู้ถ้) [จรู้�งๆ แล้�วเธอไม่�ม่%รู้ถ้]It would be nice if you helped me do the housework. [ม่�นน�าจะด%ถ้�าคุ�ณได�ชื่�วยฉั�นทำ(างานบ�านบ�าง] [จรู้�งๆ แล้�วเธอไม่�ชื่�วยเล้ย]
If I knew her name, I would tell you. (ถ้�าฉั�นรู้ �ชื่��อเธอ ฉั�นก็�น�าจะบอก็คุ�ณ) [จรู้�งๆ แล้�วไม่�รู้ �จ�ก็ชื่��อเธอ]She would be safer if she had a car. (เธอน�าจะปล้อดภั�ยก็ว�าน%& ถ้�าเธอม่%รู้ถ้) [จรู้�งๆ แล้�วเธอไม่�ม่%รู้ถ้]It would be nice if you helped me do the housework. [ม่�นน�าจะด%ถ้�าคุ�ณได�ชื่�วยฉั�นทำ(างานบ�านบ�าง] [จรู้�งๆ แล้�วเธอไม่�ชื่�วยเล้ย]
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If-ClauseIf-Clause Main ClauseMain Clause
PasPast Simple t Simple
would + infinitivewould + infinitiveorcould + infinitive could + infinitive ormight + infinitivemight + infinitive
FormationFormation
ExamplesExamples
If-ClauseIf-Clause Main ClauseMain Clause
If I studiedstudied, I would passwould pass the exams.
If I studiedstudied, I could pass could pass the exams.
If I studiedstudied, I might pass might pass the exams.
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If my friend James weren’t ill, we would play basketball with him.
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If he had a lot of money, he would buy a new house.
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If I didn’t have any homework to do, I would go out and play with friends.
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If the weather were sunny and hot, we would go to the beach and swim.
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If I had a red sport car, I would drive to work.
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If I were an animal, I would be …
a dog a cat
an elephanta snake
a shark
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If I were a super hero, I would be …
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TYPE 3: PPastast-Unreal-Unreal//Unreal ConditionUnreal Condition
•Used to express conditions in the past that did not happen. Often used to express criticism or regret . เง�#อนไขึ้ทำ$#ไม�ม$ทำางเก ด้ขึ้"�นได้�เพราะเหต�การณ์�น��นได้�เก ด้ขึ้"�นไป็แล่�ว(อด้$ต) ม�กจะใช้�แสด้งถึ"งความเส$ยใจ เส$ยด้าย น�#นเองIf + Past Perfect, Subject + would have + V3
ใชื่�สม่ม่�ติ�ในส��งทำ%�เป,นไปไม่�ได�เล้ยหรู้�อติรู้งข้�าม่ก็�บคุวาม่จรู้�งในอด%ติ
For example
If he had tried harder , he might have won.
(ถึ�าเขึ้าพยายามมากกว�าน$�เขึ้าอาจได้�ช้�ยช้นะ)
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If-ClauseIf-Clause Main ClauseMain Clause
Past PerfectPast PerfectSS++had had ++V3V3
would + have + past participlewould + have + past participleorcould + have + past participlecould + have + past participleormight + have + past participlemight + have + past participle
If-ClauseIf-Clause Main ClauseMain Clause
If I hadhad studiedstudied, I would have passedwould have passed the exams.
If I hadhad studiedstudied, I could have passed could have passed the exams.
If I hadhad studiedstudied, I might have passed might have passed the exams.
ExamplesExamples
FormationFormation
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If I hadhad studiedstudied, I would have passedwould have passed the exams.
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If we had known about Tsunami before,
they wouldn’t have died.
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Type If clause Main clause
Type 0 General Truth
Present Simple
Present Simple
Type 1 Future
Possible
Present Simple
FutureSimple
Type 2 Present Unreal
Past Simple
Would+ V infinitive
Type 3 Past Unreal
Past Perfect
Would+ have+
V3
Conclusion
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1.If it _________ (rain) heavily, our house _________ (leak).2.If we ________ (put) ice in the sun,it _________ (melt) quickly.3.If we _____________(feel) well, we ________(see) a doctor.4.If a dog ________ (see) stranger,it ________(bark).
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1.If you ____________ (work) hard,you_______ _______(fail).2.If it ________(rain),I ___________(come) and meet you in the car.3.If it ___________ (rain) tomorrow,I _______ ___________ (stay) at home.
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1.If I _________ (be) a bird, I _____________ (fly) everywhere.2.If you _________ (tell) me the truth,I ______ _____________________ (give) you some constructive advice.3.If there _________ (be) a typhoon tomorrow, I _______________ (be) very happy.
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1.If it ____________(rain) yesterday, I ___________ _____________(stay) at home.2.If the principal __________________(allow) us to supervise the tuck shop, food poisoning ____________ ____________(occur) last Friday.3.If the chairman _______________(ask) me to help, I_______________(join) to fight for better hygienic conditions.
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Exercise One
1. If you ___________________ (not come), You ________________ (miss ) the show.
do not come
will miss
2. John __________________ (buy)a car if he
_____________ (get)a job.
will buy
gets
3. Mary ________________(get) a toothache if
she_________________ (eat) too many sweets.
gets
eats
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Exercise Two
1. If I ________________ (be) four years old, I
________________ (learn) to play the piano.
were
would learn
2. If I ________________ (not fail) in the
examination, my mother_______________ (buy)
me a new computer.
had not failed
would have bought
3. We ________________________ (finish) if we
________________ (have) better preparation.
would have finished
had had