A preposition is a word used to link nouns, pronouns, or phrases to other words within a sentence

Prepositions with Adjectives
Prepositions can form phrases with adjectives to give further context to the action, emotion or thing the adjective is describing. Like verbs and nouns, adjectives can be followed by: to, about, In, for, with, at and by.

• 
  I am happily married to David.
  
• 
  Ellie is crazy about this movie.
  
• 
  Michelle is interested in politics.
  
• 
  We are sorry for your loss.
  
• 
  Jane will be delighted with her results.
  
• 
  Is he still angry at the world?
  
• 
  The entire room was astonished by the election results.
  

There can sometimes be a pattern in deciding which prepositions go with adjectives, for example, when adjectives have the same or very similar meaning to each other, they might take the same preposition:

• 
  Frightened of, afraid of, scared of, terrified of
  

Indeed, when adjectives have opposite meaning they might also take the same preposition:

• 
  Good at, great at, superb at, wonderful at
  
• 
  Bad at, terrible at, woeful at, inept at
  

There are always many exceptions to the above, but it can help that there seems to be some
consistency when adjectives have the same meaning or opposite meaning.
Nevertheless, perhaps a more general rule is that English speakers simply need to learn which prepositions go with which adjectives, as meaning can change significantly by using a different preposition.

• 
  I am good at sports means I have some athletic talent.
  
• 
  The nurse was good to my mother means she took care of her and was nice, kind, and helpful.
  
• 
  I am good with animals means I get along with them and handle them well.
  
• 
  Swimming is