zero
I / wake up late / late to work
If I wake up late, I'm late to work / I'm late to work if I wake up late
he / come / I / be surprised
If he comes, I'll be surprised / I'll be surprised if he comes
I / have enough money / travel around the world
If I had enough money, I would travel around the world / I would travel around the world if I had enough money
Rosa / take a taxi / she / not be late
If Rosa had taken a taxi, she wouldn't have been late
you / take a map / we / not lost
If you had taken a map, we wouldn't be lost / We wouldn't be lost if I had taken a map
not eat well / children / they / not be healthy
If the children don't eat well, they aren't healthy / Children aren't healthy if they don't eat well
they / come to the party / be invited
She / be happier / have more friends
She would be happier if she had more friends / If she had more friends, she would be happier
the police / arrived earlier / they / catch the burglar
If the police had arrived earlier, they would have caught the burglar / The police would have caught the burglar if they had arrived earlier
If Mary wasn't afraid of flying, we would have travelled by plane / We would have travelled by plane if Mary wasn't afraid of flying
you / red and green / mix / get brown
If you mix red and green, you get brown / You get brown if you mix red and green
he / not get into college / not pass the exam
If he doesn't pass the exam, he won't get a better job / He won't get a better job if he doesn't pass the exam
see a ghost / my kids / be scared.
If my kids saw a ghost, they would be scared / My kids would be scared if they saw a ghost
the students / not fail / studied harder
The students wouldn't have failed if they had studied harder / If the students had studied harder, they wouldn't have failed
he / be your friend / help you
If he were your friend, he would have helped you / He would have helped you if he were your friend
die / plants / they / not get enough water
Plants die if they don't get enough water / If they don't get enough water, plants die / If plants don't get enough water, they die
The dog will bite him if he doesn't run faster / If he doesn't run faster, the dog will bite him
Carlos / not be upset / you / tell the him the truth
Carlos wouldn't be upset if you told him the truth / If you told him the truth, Carlos wouldn't be upset
I / know she was sick / visit her
If I had known she was sick, I would have visited her / I would have visited her if I had known she was sick
I / not take the medicine / be in pain
If I hadn't taken the medicine, I would still be in pain / I would still be in pain if I hadn't taken the medicine
iron / rust / it / get / wet
If iron gets wet, it rusts / Iron rusts if it gets wet
Marina / not pay attention in class / not understand / she
If Marina doesn't pay attention in class, she will not understand / Marina won't understand if she doesn't pay attention in class
My brothers / not be rich / have to work / they
If my brothers weren't rich, they would have to work / My brothers would have to work if they weren't rich
If you hadn't been distracted, you wouldn't have cut your finger / You wouldn't have cut your finger if you hadn't been distracted
he / not be wearing a helmet / be dead
If he hadn't been wearing a helmet, he would be dead / He would be dead if he hadn't been wearing a helmet