IF clauses

name	COSTRUCTION	express
Open Conditional	if + present + future If I go to London, I will see the Thames.	probability
(Present) Subjunctive (Conditional)	if + past(subjunctive) + conditional If I went to London, I would see the Thames.	(present) supposition
Past Subjunctive Conditional	if + past perfect + past conditional If I had gone to London, I would have seen the Thames.	past supposition