If clause

From Teflpedia

An if clause (/ɪf klɔ:z/) is a type of conditional clause that begins with the adverb "if". Note pedagogic grammar may refer to an "if clause" when it technically referring to its hypernym, the far more general conditional clause, as the term "if clause" is more intuitively understood by students.

Roughly, there are three types:

There are other ways of forming conditional clauses, such as an unless clause.