9.2.12 Adjective + TO-infinitive

There are various structures with adjectives and the to-infinitive:

IT + linking verb + adjective + TO-infinitive

It was difficult to answer the question.
It would seem awkward to call her again.

Noun + linking verb + adjective + TO-infinitive

Here the noun is the object of the infinitive:

The question was difficult to answer.
A good translator is hard to find.

IT + linking verb + adjective + noun + TO-infinitive

It was a difficult question to answer.
It's a big house to clean.

IT + linking verb + adjective + FOR something/somebody + TO-infinitive

It looked impossible for me to finish on time.
It is necessary for this door to be locked.

IT + linking verb + adjective + OF somebody + TO-infinitive

It is very kind of you to come with me to the embassy.
It was stupid of him to press the emergency button.

TOO, ENOUGH + TO-infinitive

Too comes before an adjective or adverb. Enough follows an adjective or adverb but comes before a noun:

It was too difficult (for me) to answer the question.
The question was too difficult to answer.
It was too difficult a question to answer.
It was a difficult enough question to answer even for a native speaker.

Manuela got to the station too late to catch the train.
Manuela did not get to the station early enough to catch the train.

I didn't have enough money to buy that beautiful sweater.

Noun + linking verb + adjective + TO-infinitive

Here the noun is the doer of the action expressed by the infinitive:

The little boy was afraid to jump.
He was ashamed to speak to her again.
We were happy to see you.
I am glad to have helped you.
Our company is pleased to offer you a job as a financial risk manager.
I am proud to announce this year's winner.
Aren't you sad to hear that?
I'm sorry to disturb you.