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Reason & Result (because/so/therefore)

Connecting cause and effect with because, so, therefore

beginner

When to Use Reason & Result (because/so/therefore)

  • •Because to give a reason: I stayed home because it rained.
  • •So to show a result: It rained, so I stayed home.
  • •Therefore for formal result across sentences: It was raining. Therefore, we stayed.
  • •Because answers why; so/therefore show consequence.
  • •Place commas with so (independent clauses).

How to Form Reason & Result (because/so/therefore)

Affirmative (+)

Reason clause with because; result clause with so/therefore

Negative (-)

Negate verb as needed inside clause

Question (?)

Use why for questions; because answers why

💡 Comma before so when connecting two independent clauses. Therefore usually after semicolon/period.

Examples of Reason & Result (because/so/therefore)

✓We stayed home because it was raining.

✗We stayed home, because it was raining (informal okay, often no comma).

Because clause follows main clause.

✓It was raining, so we stayed home.

✗It was raining so we stayed home (comma preferred with two clauses).

Use comma with so linking two independent clauses.

✓It was raining; therefore, we stayed home.

✗It was raining, therefore we stayed home.

Therefore needs semicolon/period + comma.

Common Mistakes with Reason & Result (because/so/therefore)

💡 Practice Tips for Reason & Result (because/so/therefore)

  • • Because = reason; so/therefore = result.
  • • Comma before so for two independent clauses.
  • • Therefore acts like however; punctuate with semicolon/period + comma.
  • • Swap order: Because it rained, we stayed. We stayed because it rained.
Quick Quiz
  1. 1.We stayed home   it was raining.
  2. 2.Which sentence is punctuated correctly? 
  3. 3.It was raining,   we stayed home.
  4. 4.Which question form is correct? 
  5. Question 5: Combine the clauses: It was late. We went home. → blank it was late, we went home.
    5.Combine the clauses: It was late. We went home. → it was late, we went home.
  6. Question 6: Add the missing comma: It was raining blank so we stayed home.
    6.Add the missing comma: It was raining so we stayed home.
  7. Question 7: Punctuate: It was raining blank therefore, we stayed.
    7.Punctuate: It was raining therefore, we stayed.
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