purpose
noun
verb
Phrases
Origin:
Middle English: from Old French porpos, from the verb porposer, variant of proposer (see propose)
Grammar
Adverbials and adverbial clauses can be used to provide information about why things occur—for what purpose they are done.AdverbialsThe commonest type of adverbial used to show purpose is a prepositional phrase beginning with for:I’ve always grown vegetables for pleasure or necessity. Adverbial clausesAdverbial clauses of purpose often begin with so that:She sat forward so that she could see into the car’s wing mirror. Infinitive clauses are also frequently used for this purpose, introduced by in order to, so as to, or just to:Someone may grab your collar with both hands in order to headbutt you in the face. In the example above in order to could be replaced by either so as to or to.