Third conditional

I couldn't stay with you. I wouldn't have left if I hadn't had the appointment.

I could stay with you. I wouldn't have had left if I didn't have the appointment.

I couldn't stay with you. I wouldn't have left if I did have the appointment.

I couldn't stay with you. I wouldn't have left if I didn't had have the appointment.

My sister didn't want to marry Jim. If he had proposed to her, she would have refused

My sister didn't want to marry Jim. If he had proposed to her, she would refused

My sister didn't want to marry Jim. If he had have proposed to her, she would refuse

My sister didn't want to marry Jim. If he has proposed to her, she would refuse

If the students hadn't been late for the exam, they would have passed.

If the students hasn't been late for the exam, they would have passed.

If the students hadn't been late for the exam, they would had have passed.

If the students hadn't been late for the exam, they would had passed.

If the weather hadn't been so cold, we would have gone to the beach.

If the weather hadn't be so cold, we would have gone to the beach.

If the weather hasn't been so cold, we would have gone to the beach.

If the weather hadn't been so cold, we will have gone to the beach.

If the baby had slept better last night, I wouldn't have been so tired.

If the baby has slept better last night, I wouldn't have been so tired.

If the baby had slept better last night, I woldn't have been so tired.

If the baby had slept better last night, I wouldn't have be so tired.

If we had tidied our flat, we wouldn't have lost our keys

If we have tidied our flat, we wouldn't have lost our keys

If we had tidied our flat, we wouldn't had lost our keys

If we had tidied our flat, we woldn't have lost our keys

If Luke hadn't sent flowers to his mother, she wouldn't have been happy

If Luke hasn't sent flowers to his mother, she wouldn't have been happy

If Luke hadn't sent flowers to his mother, she wouldn't have be happy

If Luke hadn't sent flowers to his mother, she wouldn't been happy

If Julie hadn't gone to Sweden, she would have gone to Germany.

If Julie haven't gone to Sweden, she would have gone to Germany.

If Julie hadn't gone to Sweden, she would had gone to Germany.

If Julie hadn't went to Sweden, she would have gone to Germany.

If we hadn't had an argument, we wouldn't have been late. 

If we hadn't have an argument, we wouldn't have been late. 

If we hadn't had an argument, we wouldn't has been late. 

If we hadn't had an argument, we wuldn't have been late. 

 If I hadn't gone to the party, I wouldn't have met Amanda.

 If I hadn't gone to the party, I wouldn't have meet Amanda.

 If I had gone to the party, I woldn't have met Amanda.

 If I hadn't go to the party, I wouldn't have met Amanda.

 If the children hadn't eaten all that chocolate, they wouldn't have felt sick.

 If the children hadn't eaten all that chocolate, they wouldn't have feel sick.

 If the children hadn't eaten all that chocolate, they wouldn't have fell sick.

 If the children hadn't eat all that chocolate, they wouldn't have felt sick.

If she had studied Mandarin, she would have gone to Beijing

If she had study Mandarin, she would have gone to Beijing

If she had studied Mandarin, she would have go to Beijing

If she had studyed Mandarin, she would have gone to Beijing