Conditional sentences III

1. Use

It is impossible to fulfil a condition which is given in the if-clause.

2. Form

if clause	main clause
Past Perfect	would + have + past participle
	could + have + past participle
	might + have + past participle

3. Examples

if clause	main clause
If I had studied,	I would have passed the exams.
If I had studied,	I could have passed the exams.
If I had studied,	I might have passed the exams.

The if-clause can be at the beginning or at the end of a sentence.

if clause	main clause
If I had studied,	I would have passed the exams.

main clause	if clause
I would have passed the exams	if I had studied.