-ing form or infinitive?
Some verbs may be followed by either an infinitive or an -ing form.
The meaning, however, will change accordingly.
He stopped to smoke = he stopped walking to light up
He stopped smoking = he didn't smoke any more
The verbs that may be followed by either the infinitive or an -ing form are:
advise, allow, attempt
can't bear, begin
permit, prefer, propose
see, start, stop
We don't allow smoking in here = Smoking is not allowed
We don't allow people to smoke