if is on the Basic English 850 List.
idea - if - ill
if is one of the 1000 most common headwords.
identify - if - imagine

Pronunciation

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Preposition

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Preposition
if

  1. Used to denote a condition.
    If it rains, I will get wet.
    I'd prefer it if you took your shoes off.
  2. although
    He was a great friend, if a little strange.
  3. When ... occurs (a programming statement).
    If A, then B, else C.

Subordinator

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Subordinator
if

  1. 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.
    It doesn't matter if you have money or not.

Singular
if

Plural
ifs

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