The documentary was so informative that I learned a lot.

It was such an informative documentary that I learned a lot.
This puzzle is not easy enough for kids.

This puzzle is too difficult for kids.
The furniture is very expensive. They can't buy it.

The furniture is too expensive for them to buy.
She is too busy to attend the meeting.

She is so busy that she can't attend the meeting.
The story was so captivating that I couldn't put it down.

It was such a captivating story that I couldn't put it down.
The test was very hard. Many students failed.

The test was too hard for many students to pass.
The lake is too shallow for swimming.

The lake is not deep enough for swimming.
The teacher is so nice that everyone likes her.

The teacher is such a nice teacher that everyone likes her.
The sky was so clear that we could see the stars.

It was such a clear sky that we could see the stars.
The shoes are not comfortable enough for long walks.

The shoes are too uncomfortable for long walks.
The presentation was so boring that I almost fell asleep.

It was such a boring presentation that I almost fell asleep.
The book is too thick to carry in my bag.

The book is not thin enough to carry in my bag.
He is too lazy to do his homework.

He is so lazy that he doesn't do his homework.
The documentary was so inspiring that I decided to volunteer.

It was such an inspiring documentary that I decided to volunteer.
The hotel is not luxurious enough for our needs.

The hotel is too basic/simple/modest for our needs. (Several options work here)
This puzzle is so complicated that I need help.

It is such a complicated puzzle that I need help.
The song is too sad for me to listen to.

The song is not cheerful/happy enough for me to listen to.
The party was so fun that everyone stayed late.

It was such a fun party that everyone stayed late.
The jacket is not warm enough for winter.

The jacket is too thin/light for winter.
The beach was too crowded for us to relax.

The beach was not empty/uncrowded enough for us to relax.