1/ He is too old to wear this coloured shirt.

He is not enough young to wear this coloured shirt.

2/ She is too weak to carry this box.

She is not enough strong to carry this box.

3/ This pen is too expensive for me to buy.

This pen is not enough cheap for me to buy.

4/ Bill was too stupid to understand what I had said.

Bill is not enough intelligent to understand what I had said.

5/ This bag is too heavy for her to carry.

This bag is not enough light for her to carry.

6/ The test was too difficult for them to do.

The test was not enough easy for them to do.

7/ I'm too poor to help you with the money.

I'm not enough rich to help you with the money.

8/ This book is too dull to read.

This book is not enough smart to read.

9/ The room is too dark for us to study 

The room is not enough light for us to study.

10/ The shelf is too high for her to reach.

The shelf is not enough short for her to reach.