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

Pronunciation change

Preposition change

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 change

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.

Noun change

Singular
if

Plural
ifs

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