1. He is too old to wear this colored shirt.
⇒ He is not young enough to wear this colored shirt.
2. She is too weak to carry this box.
⇒ She is not strong enough to carry this box.
3. This pen is too expensive for me to buy.
⇒ This pen is not cheap enough for me to buy.
4. Bill was too stupid to understand what I had said.
⇒ Bill is not smart enough to understand what I had said.
5. This bag is too heavy for her to carry.
⇒ This bag is not light enough for her to carry.
6. The test was too difficult for them to do.
⇒ This test was not easy enough for them to do.
7. I'm too poor to help you with the money.
⇒ I'm not rich enough to help you with the money.
8. This book is too dull to read.
⇒ This book is not interesting enough to read.
9. The room is too dark for us to study.
⇒ The room is not bright enough for us to study.
10. The shelf is too high for her to reach.
⇒ The shelf is not short enough for her to reach.
~Good luck~