When do you use prototype, ING and infinitive at the beginning of English sentence verbs?

In principle, English sentences cannot start with verb prototype, but Please is often omitted from imperative sentences or placed at the end of sentences. For example, please open the door, we often say please open the door! Or just open the door. Therefore, only in imperative sentences do you start with the prototype of verbs. The verb ING you mentioned is actually a gerund. The verb plus ING can be said to be a gerund or a present participle, but the present word cannot be the subject. Gerund and infinitive belong to non-predicate verbs. If you use ING when referring to abstract actions and infinitive when referring to specific actions, for example:

Riding a bike can make people smart. Riding a bike can make people agile. It takes a lot of effort to complete this project. Being is a gerund that means positive meaning, while infinitives often mean purpose.