Rule: A few adjectives allow infinitive postmodifiers only if the infinitive is a verb of perception.
Examples of errors:
There are a number of adjectives expressing emotions or attitudes that allow infinitive postmodifiers (Type IV adjectives--cf. 3.13). Some of these, however, seem to allow them only if the infinitive verb is one of intellectual or sensory perception. Interested, angry, excited, and furious, for example, have this restriction, while happy and glad do not:
I was
I was
interested
angry
excited
to see her in that dress
*to go downtown
happy
glad
furious
to see her in that dress
to go downtown
Alternatively, one can say:
I was angry/excited/furious/happy/glad about going downtown.
I was interested in going downtown.
Go, play, meet, and travel in (l)-(5) are not verbs of perception, so the sentences sound odd, but compare: