Transform it into a complex sentence:
He was too weak to walk.

• Correct Answer: গ) He was so weak that he could not walk.

- He was too weak to walk.
- Which is a simple sentence.
- যাকে Complex sentence এ রূপান্তর করতে হবে।
- Complex sentence এ একটি main বা principle clause থাকে এবং একটি subordinate clause থাকে।

- “Too…to” যুক্ত থাকলে তাকে “so…that” যুক্ত করে complex structure এ transform করতে হয়।
- He was so weak that he could not walk.
- এখানে he could not walk. principle clause এবং He was so weak that হলো subordinate clause.
- “Too weak to walk” মানে: “so weak that he could not walk” - এটি complex বাক্য।

Other options:
ক) He was weak and he could not walk. → Compound sentence, not complex.

খ) He was very weak so he didn’t walk. → Compound sentence, uses "so".

ঘ) He couldn’t walk because of weakness. → Simple sentence, uses noun phrase.

Source: A Passage to the English Language, S.M. Zakir Hussain.