Adjectives Followed by the Infinitive

Some adjectives are always followed by the infinitive form of the verb and never by gerunds. It would be incorrect to use gerunds after the following adjectives:

  • Anxious
  • Boring
  • Dangerous
  • Hard
  • Eager
  • Easy
  • Good
  • Strange
  • Pleased
  • Prepared
  • Ready
  • Able
  • Usual
  • Common
  • Difficult


  • Incorrect: He was anxious making a move.
  • Correct: He was anxious to make a move.
  • Incorrect: It was boring watching that movie again.
  • Correct: It was boring to watch that movie again.
  • Incorrect: It is dangerous walking on that road.
  • Correct: It is dangerous to walk on that road.
  • Incorrect: It’s hard changing a bad habit.
  • Correct: It’s hard to change a bad habit.
  • Incorrect: He is eager meeting his family.
  • Correct: He is eager to meet his family.
  • Incorrect: It is easy saying anything but difficult doing.
  • Correct: It is easy to say anything but difficult to do.
  • Incorrect: It is good hearing from you.
  • Correct: It is good to hear from you.
  • Incorrect: It was strange meeting him.
  • Correct: It was strange to meet him.
  • Incorrect: I was prepared doing everything for her.
  • Correct: I was prepared to do everything for her.
  • Incorrect: I was pleased watching the movie.
  • Correct: I was pleased to watch the movie.
  • Incorrect: We are ready going.
  • Correct: We are ready to go.
  • Incorrect: I cannot believe that he is able doing it.
  • Correct: I cannot believe that he is able to do it.
  • Incorrect: It has become usual coming late in the office.
  • Correct: It has become usual to come late in the office.
  • Incorrect: It is very uncommon getting such good products here.
  • Correct: It is very uncommon to get such good products here.
  • Incorrect: It is always difficult scoring runs on this kind of surface.
  • Correct: It is always difficult to score runs on this kind of surface.

Note: The rule is only applicable to the adjectives in the list above. The synonyms of these words might have a different rule. For example, the adjective 'able' has a similar meaning to the word 'capable,' but the grammatical function of these two words is different.


  • Correct: I will be able to perform the duties for you.
  • Incorrect: I will be capable to perform the duties for you.
  • Correct: I will be capable of performing the duties for you.
  • Grammar Lab

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