⇒
1. Both of the chairs are uncomfortable.
→ Neither of the chairs are comfortable.
2. Peter spent three hours on repairing his house.
→ It took Peter 3 hours to repair his house.
3. He doesn't lets anyone smoke in his house He hardly allowed.
→ He hardly allows someone to smoke in his house.
4. He made his children study hard late at night.
→ He forced his children to study hard late at night.
5. Your younger brother is too weak to lift that box.
→ Your brother isn't strong enough to lift that box.