Compléter real conditionalVersion en ligne real conditional. par Jenniffer Soto 1 conditional will present present used if used usually complement activity simple will f is a connective preposition that takes a clause as its . ( Some shorter forms exist : I'll call you necessary . ) The if structure is not a clause but a prepositional phrase [ if + clause ] . In a / future statement , an if phrase expresses a single occurrence of a situation that is required for the acitivity in the main clause to occur . ( If X , then Y ) The speaker is uncertain whether the in the if phrase occur or not . The tense is in the clause after if , and a modal ( will , can , may , might , shall ) is in the main clause . The meaning is " Under the condition that X occurs , Y happen .