𝙄𝙁 𝙀𝙑𝙀𝙍 Complete details about this clause and it's uses Informally, 𝙞𝙛 𝙚𝙫𝙚𝙧 is used to emphasize that sth is certainly true--for emphasizing that a particular description is exactly right for sb/sth We use past subjunctive in 𝙞𝙛 𝙚𝙫𝙚𝙧 -clause to refer to counterfactual of the present condition while in the main clause we use indicative present simple to refer to present certainty of the result. 𝙄𝙛 𝙚𝙫𝙚𝙧- clause is another mixed type of conditional sentence. ●You're a fool 𝙞𝙛 I 𝙚𝙫𝙚𝙧 saw one. (i.e., l've never seen any fool in my life, but if l ever saw one, surely you fit the criteria.) ●You're a hero 𝙞𝙛 there 𝙚𝙫𝙚𝙧 was one. (i.e., l've never seen any hero. If such a thing as a hero exists,it is certain that you a perfect example of that kind. Here we use either the unreal past "was" or the past subjunctive "were" ) ●Tim'