Prepositions of Purpose

Expressing WHY something is done

Sections
Introduction

1. Definition & Core Meaning

Prepositions of Purpose explain why or for what reason an action is done.

What is it?
Expressing WHY something is done

2. Use Cases

WordMeaningExample
forThe purpose, goal, or intended use"This cup is for coffee." / "She studies for a better future."
to (+ infinitive)The goal that drives the action"I exercise to stay healthy." / "She left early to catch the train."
because ofCaused by something (followed by noun/pronoun)"The flight was delayed because of bad weather."
due toCaused by (more formal, followed by noun)"Class was cancelled due to the strike."
for the sake ofFor the benefit or purpose of"He did it for the sake of his family."
in order toEmphasised purpose (formal)"She studied hard in order to pass."
so as toEmphasised purpose (formal)"Speak clearly so as to be understood."

3. When to Use It (Time Expressions/Signals)

[!NOTE]
"because of" and "due to" are followed by nouns. "because" (without "of") is followed by a full clause.

4. How to Use It (Rules)

  • Use for + noun to show purpose: a knife for cutting
  • Use to + infinitive to show the intended goal: she went to the shop to buy bread
  • Use because of / due to + noun for cause: because of traffic
  • Do NOT say "due to the fact" in casual speech — just say "because"