1. Future Real Condition
· if + Simple Present, Simple Future
· Simple Future + if + Simple Present
Conditional clause type 1 ini merujuk ke masa depan. Kegiatan di masa depan hanya akan terjadi jika suatu kondisi tertentu terpenuhi pada saat itu. Perhatikan juga penggunaan tanda koma (,) dalam rumus.
Ex:
· If I go to my friend's house for dinner tonight, I will take a bottle of wine or some flowers.
· When you call me, I will give you the address.
2. Present Unreal Condition
· if + Simple Past, Simple Past Future (would + V1)
· Simple Past Future (would + V1) + if + Simple Past
Conditional Sentences Type II merujuk kepada situasi di masa kini ( present situation). Suatu kegiatan dapat terjadi jika keadaan saat ini berbeda dengan yang sebenarny. Perhatikan juga penggunaan tanda koma (,)dalam rumus.
Ex:
· If I owned a car, I would drive to work.
Kenyataannya saya tidak memiliki mobil sekarang.
· She would travel around the world if she had more money.
Kenyataannya dia tidak mempunyai uang lebih.
· I would play basketball if I were taller.
Notes : untuk conditional tipe II ini, dalam klausa Simple Past-nya hanya digunakan to be “were”, apapun subjeknya.
Ex:
· If he was French, he would live in Paris. (salah)
· If he were French, he would live in Paris. (benar)
3. 
Past Unreal Condition
Past Unreal Condition· if + Past Perfect, Past Future Perfect
· Past Future Perfect+ if + Past Perfect
Conditional sentences Type III merujuk kepada keadaan di masa lalu ( past situations). Sebuah kegiatan dapat terjadi di masa lampau jika kondisi tertentu telah terpenuhi di masa itu. Pada kenyataannya keadaannya berbeda. Kita hanya membayangkan saja “bagaimana kalau saja kondisi itu terjadi”.
Ex:
· If I had owned a car, I would have driven to work.
In fact, I didn't own one, so I took the bus.
· She would have traveled around the world if she had had more money.
4. Zero Condition
· If + simple present, simple present
· Simple present + if + simple present
Digunakan untuk menyatakan sesuatu yang selalu/ sering/ kadang-kadang terjadi jika sesuatu (kondisinya) terjadi
Ex:
· If I go to bed late, I always feel tired the next day.
· Vegetables taste awful if you cook them for too long.
5. Without if
Bentuk conditional sentences, dapat digunakan juga dengan menghilangkan “if”, antara lain:
· Menggantinya dengan when
When you call me, I will give you the address = if you call me
· Atau menghilangkannya sama, dengan cara memindahkan aux ke depan subjek untuk TYPE 2 dan TYPE 3.
Were I you, I would call the police = if I were you, I would call the police
SOAL-SOAL LATIHAN
1. He ___ come if you call him.
A. would
B. would have
C. would rather
D. will
2. I won’t come if you ___ me.
A. don’t invite
B. did not invite
C. have been invitation
D. has been invited
3. You ___ go this afternoon if you want to.
A. can
B. would
C. should
D. would have
4. She wouldn’t have arrived at the station on time unless her father had driven her there.
It means .___.
A. She arrives at the station on time
B. She came late to the station
C. She did not miss the train
D. Her father did not drive her to the station
5. If it ___ today, I would not go to the school.
A. rained
B. rains
C. had rained
D. rain
6. It’s very cold and windy outside. If you don’t have a coat, you ___ borrow mine.
A. could
B. shall
C. can
D. might
7. Unless his father ___ him there, he would not have arrived at the station on time.
A. has drive
B. has driven
C. drives
D. had driven
8. If my mother ___ the money, I ___ the book.
A. had given, would buy
B. gives, shall buy
C. gave, would have bought
D. gave, will buy
9. Had I not been given the book, I would have failed the test. This sentence means __.
A. I fail the test
B. I failed the test
C. I passed the test
D. I was not given the book
10. ___, I might borrow it from him.
A. If his this novel
B. If the novel him
C. If his the novel
D. Were the novel his