We know some verbs followed by gerunds. When these verbs used with noun like in my example , should we always use them with infinitives ?
"Shop doesn't allow smoking." (Without noun )
"I allow you to smoke in my car." (With noun)
It's a matter for each particular verb what kinds of objects it can take: sometimes verbs with the same meaning take different kinds of objects.
In the case of allow, it can take a gerund ("allow smoking") or an infinitive clause with explicit subject ("allow you to smoke"). But it does not take a bare infinitive ("*allow smoke") or a bare infinitive with to: ("*allow to smoke").