When to use infinitive and when to use participle after there are many?

If the subject uses the infinitive after therearemany, the predicate and the object should also use the infinitive. The subject uses a participle, and the slogan and the object should also use participles. This is called symmetry in English.

The infinitive of a verb refers to a form of a verb that does not change in form and therefore does not indicate person, quantity, or tense. A participle is a word that has the characteristics of both a verb and an adjective, especially an English verb adjective ending in -ing or -ed, -d, -t, -en or -n. It has the function of an adjective and expresses various verbs at the same time. Characteristics, such as tense, voice, performance of adverbial modifiers and performance of predicates. Participle is divided into present participle and past participle, which is a non-predicate verb form.