Is there a rule which explains why 'to eat' in the following phrase is an infinitive?
'I am dead-set against allowing my daughter to eat junk food.'
Is there a rule which dictates that an infinitive form will follow a gerund form? For example:
'Deciding to eat, he stopped at the next restaurant he saw.'
'Running to save time is a waste of energy! I recommend you take the car instead.'
I am not a teacher.
It doesn't have anything to do with the gerund, it's because the verbs you've chosen are followed by the infinitive regardless of their form.
I don't allow my daughter to eat junk food.
I have never allowed… to eat junk food.
I will never allow… to eat junk food, etc…
I decide to eat…
I decided to eat…and so on.
You can use a gerund without an infinitive quite easily.
His drinking annoys me.
Her smoking is killing her.
Reading helps us acquire a wide vocabulary.