So as to do something Definition 1 of 2Pro Tip 1/3Action Purpose Use 'so as to' when explaining why you're doing something. She saved money so as to buy a new car. Pro Tip 2/3Forward Planning It suggests actions taken now to achieve future goals. They're studying English so as to work abroad. Pro Tip 3/3Slightly Formal The phrase is more common in written or formal spoken language. We offer tutorials so as to assist students with their exams.