Besides the three basic types of conditionals, there are other sentences with if which are not conditionals because they do not express a condition. Some books, however, call these sentences the "zero conditional", and for the sake of convenience we will use this term, too. In addition to these there is also what we call the mixed conditional.

Note the punctuationThe use of special marks that are added to writing to separate phrases and sentences, to indicate that something is an exclamation, a question, etc. E.g.: "Who do you think I am?" he asked. (" ? .) rule for all kinds of if-sentences: there is a comma between the two clauseA group of related words containing a subject and a verb.s if the if-clause is first. If not, there is no comma.

• Zero conditional
  • Zero conditional with past reference
  • Zero conditional with present reference
• First conditional
  • First conditional and GOING TO
  • First conditional and imperatives
  • First conditional and present continuous
  • First conditional and present perfect
• The difference between the zero and the first conditional
• Second conditional
• Third conditional
• Mixed conditionals
  • Mixed conditional: general condition with an unreal result in the past
  • Mixed conditional: past condition with a result in the present
• Modals used in conditional sentences
  • Modals in first conditional
    • Modals in the IF-clause of first conditional sentences
    • Modals in the main clause of first conditional sentences
  • Modals in second conditional
    • Modals in the IF-clause of second conditional sentences
    • Modals in the main clause of second conditional sentences
  • Modals in third conditional
    • Modals in the IF-clause of third conditional sentences
    • Modals in the main clause of third conditional sentences
• Linking words used instead of IF
  • EVEN IF
  • ONLY IF
  • PROVIDED, PROVIDING, AS LONG AS
  • SUPPOSE / SUPPOSING
  • UNLESS
• Less likely conditions
  • Less likely conditions in first conditional
  • Less likely conditions in second conditional
  • Less likely conditions in third conditional
• Inversion in conditional sentences
• Notes: IF-sentences and conditionals

Unreal tenses
Conditionals and unreal tenses Zero conditional