if that’s the case

if Preposition

— If is used in a condition: — # When something will cause something else — #: If it rains, I will get wet. — # When a condition is not true — #: I'd prefer it if you took your shoes off. — # although — #: He was a great friend, if a little strange. — # When ... occurs (a programming statement). — #: If A, then B, else C.

if Subordinator

— If is used to report questions and things that are unknown. She asked if they had arrived yet. I don't know if I want to go or not.

if Noun

— If is a conditional situation. There are many ifs we need to consider before we start on the plan.

the Determiner

— Used, instead of a, to reference something specific, already known to exist. Compare "I read a book." and "I read the book." — Used with a stress, to show that the word following is special. Are you the John Smith that I went to school with? — Used with an adjective that acts like a noun to mean all of the people concerned The poor are always with us. — Used with superlatives forms of adjectives and adverbs. You are the best.

case Noun

— A case is a container to hold something. He opened the case and pulled out his violin. — A case is a matter for police or in court. The judge did not accept his case. — A case is the form of a noun showing how it is used in a sentence. The word "he" is in the subject or nominative case. — A case is a person of a certain kind. That man is sure a hard case.

case Verb

— If a police officer cases a house, he or she watches it until something happens. We were casing a house all night in Brooklyn.