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.