An "infinitive" in English is a verb preceded by the word to, as in to study. Many English verbs can be followed by a grammatical structure that contains an infinitive and is known as an "infinitive ...

I popped into the supermarket for some apples on the way home. (Not: I popped into the supermarket for buying some apples…) I stopped by at his office for a chat about our marketing strategy. (Not: I ...

In addition, some of these verbs need an object, usually a person or people. The police warned us not to enter the building. The speaker invited the audience to ask questions. The best way to learn ...