Combine the following sentences into one sentence using an adverb clause of purpose:
Grandfather sat near the window of the train. He wanted to see the mustard fields.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Grandfather sat near the window of the train so that he could see the mustard fields.
Adverb clause of purpose:
- An adverb clause of purpose tells why someone does something, that is, the aim of the action. It begins with so that and takes its own subject and a verb like could, can or might.
- Grandfather’s aim was to see the fields. So “He wanted to see” becomes “so that he could see”. The clause has its subject “he” and its verb “could see”.
Why the Other Options are Incorrect?
Option 1: Grandfather sat near the window of the train, he could see the mustard fields. — Incorrect. The option has no joining word. Two full clauses are only put side by side with a comma, so there is no clause of purpose.
Option 2: Grandfather sat near the window of the train so that to see the mustard fields. — Incorrect. “So that” must be followed by a subject and a full verb. The option says “so that to see”, which has neither.
Option 4: Grandfather sat near the window of the train so that could he see the mustard fields. — Incorrect. The option says “could he see”. This is question order. In the clause the subject comes first: “he could see”.