Third conditional

If we had arrived earlier,

• we hadn't missed the plane.

• we wouldn't missed the plane.

• we wouldn't have missed the plane.

• we wouldn't miss the plane.

I wouldn't have told her

• if I'd known it was a secret.

• if I'd knew it was a secret.

• if I would know it was a secret.

• if I would have known it was a secret.

If he hadn't fallen asleep,

• he wouldn't have crash the car.

• he wouldn't crash the car.

• he wouldn't crashed the car

• he wouldn't have crashed the car.

We would have called you

• if we'd have your number.

• if we would have your number.

• if we had your number.

• if we'd had your number.

If I'd done all my homework,

• I would have pass the course.

• I would have passed the course.

• I would pass the course.

• I would passed the course.

John would've bought a present

• if he knew it was your birthday.

• if he'd known it was your birthday.

• if he'd know it was your birthday.

• if he'd knew it was your birthday.

If the teacher hadn't helped him,

• he would fail the exam.

• he had failed the exam.

• he would've failed the exam.

• he would have fail the exam.

I would have bought that computer

• if it had been on sale.

• if it has been on sale.

• if it was on sale.

• if it would have been on sale.