Advanced ESL: Mastering Subordinate Clauses of Purpose (So that, In order that)

📚 Understanding Subordinate Clauses of Purpose

Subordinate clauses of purpose explain why someone does something. They are introduced by conjunctions like "so that" and "in order that". These clauses clarify the intention or aim behind an action.

📜 Historical Context

The use of subordinate clauses to express purpose dates back to Old English. Over centuries, these structures have evolved, becoming integral to clear and precise communication in modern English. The phrases "so that" and "in order that" have solidified their roles in formal and academic writing.

🔑 Key Principles

• 🎯 Clarity of Intention: The primary function is to explicitly state the purpose of an action.
• ⚙️ Subjunctive Mood: Often used with modal verbs (e.g., can, could, may, might, will, would) to indicate possibility or intention.
• ✒️ Formal Usage: "In order that" is generally more formal than "so that".
• ✨ Placement: The clause can come before or after the main clause, but placement after the main clause is more common.

✍️ Real-world Examples

Let's look at some examples to illustrate how these clauses are used:

1. She studies hard so that she can pass the exam.
2. They saved money in order that they might buy a house.
3. He exercises regularly so that he will stay healthy.
4. The company invested in new technology in order that it could increase efficiency.
5. I am writing this email so that you are aware of the changes.

💡 Common Mistakes to Avoid

• ❌ Redundancy: Avoid using both "in order to" and "so that" in the same clause.
• ⚠️ Incorrect Verb Form: Ensure the verb in the subordinate clause agrees with the modal verb.
• 📝 Misplaced Comma: Use a comma only when the subordinate clause comes before the main clause.

🧪 Practice Quiz

Complete the following sentences using "so that" or "in order that".

1. I turned on the radio __________ I could listen to the news.
2. She wore a coat __________ she wouldn't get cold.
3. They left early __________ they would arrive on time.
4. He saved all his money __________ he could buy a new car.
5. The teacher explained the lesson again __________ everyone understood.

✅ Answers to Practice Quiz

1. so that
2. so that
3. in order that
4. so that
5. in order that

🌍 Conclusion

Mastering subordinate clauses of purpose enhances your ability to express intentions clearly and precisely. By understanding their function and usage, you can significantly improve your English communication skills.