Is the -ing form always a gerund when it it is followed by a preposition?
In wikipedia's definition for gerund it says (when talking of verb patterns with the gerund) that prepositions are often followed by a gerund. Can this mean that sometimes an -ing form verb that is not a gerund can be used?
In Grammar for English Language Teachers, Martin Parrott uses the 'the -ing form' when talking about using them after prepositions, why does he say "this has to be an -ing form", rather than 'this has to be a gerund'?
In wikipedia's definition for gerund it says (when talking of verb patterns with the gerund) that prepositions are often followed by a gerund. Can this mean that sometimes an -ing form verb that is not a gerund can be used?
In Grammar for English Language Teachers, Martin Parrott uses the 'the -ing form' when talking about using them after prepositions, why does he say "this has to be an -ing form", rather than 'this has to be a gerund'?