`1` He isn't young enough to wear this colour shirt 

`2` She isn't strong enough to carry this box

`3` This pen isn't cheap enough for me to buy 

`4` Bill wasn't intelligent enough to understand what I had said 

`5` This bag isn't light enough for hê to carry 

`6` The test wasn't easy enough for them to do 

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

`8` This book isn't smart enough to read 

`9` The room isn't bright enough for us to study 

`10` The shelf isn't short enough for her to reach 

# Dorris (ㆁωㆁ)

My answer is:

The sentence

1 :  He isn't young enough to wear this colour shirt 

= S + be + ad

2 :  She isn't strong enough to carry this box

= S + be + adj

3 : This pen isn't cheap enough for me to buy 

= S + tobe + too + adj + (for + 0) + to - V

4 : Bill wasn't intelligent enough to understand what I had said 

= S + tobe + not + adj + (for + 0) + to - V

5 : This bag isn't light enough for hê to carry 

6 : The test wasn't easy enough for them to do 

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

8 : This book isn't smart enough to read 

9 : The room isn't bright enough for us to study 

10 : The shelf isn't short enough for her to reach