Could you please give an example of the sentence where after a word "ambition" gerund is used?
I've always thought that I could use only the infinitive, until I came across this:
"The gerund as the prediactive may be used in the following patterns.
A In sentences of this kind the subject is usually expressed by denoting abstract notions such as ambition, aim, hobby, desire, etc."
e.g. His hobby is collecting modern pictures.
The main thing is getting there in time.