What are clauses of purpose? In this English lesson you will learn about the very important clauses of purpose and how we use them in English. Some of the main clauses of purpose are: in order that, so that, in order to, so as to, in case We use them to answer the question Why? or What for? Clause of purpose + infinitive We play sport to, in order to, so … [Read more...] about English grammar – clauses of purpose