if

From Wiktionary
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.