Here are just a few cases where
to is a preposition, not part of an infinitive. The
-ing form is used with all prepositions;
to is no exception.
shortcut to learning ...
approach to studying ...
key to learning ...
objection to going ...
secret to knowing ...
path to learning ...
aversion to doing ...
reference(s) to going ...with a view to finding ...
object to, look forward to, pay attention to, take exception to, take
to, resort to, get around to, contribute to, devote time to, amount to
be:
restricted to, limited to, reduced to, used to, accustomed to, averse to, given to, committed to
CJ
See also Re: spend, Re: to motivating and energizing, Re: Gerunds question.. when to use & when not to