So As and (In Order) To for Purpose

We use certain phrases to explain why someone does something (their purpose or intention). 1. (in order) to Meaning: Shows the reason why someone does something. Structure: clause + (in order) to + verb (infinitive) Examples: He came to help me. → His purpose was to help me. I do it in order to save money. → The reason I do it is to save money. Note: "In order" is optional. You can simply say: I do it to save money. Use: Common in speaking and writing. Neutral in style. 2. so as to Meaning: Also expresses purpose, usually more formal. Structure: so as to + verb (infinitive) Examples: I got up at 6:00 so as to be on time. So as to keep fit, I go for a run every morning. Difference from (in order) to: - so as to is slightly more formal and less common in everyday speaking. - (in order) to can be used in both formal and informal situations. 3. Negative purpose: so as not to / in order not to Meaning: Explains that someone does something to avoid something else. Structure: so as/in order + not to + verb (infinitive) Examples: In order not to seem rude, he stayed silent. I came in very quietly, so as not to wake anyone.