A summary of the usage of to do infinitive

Verb infinitive refers to a verb form that has no morphological changes and does not indicate person, quantity or tense. It is called infinitive because verbs are not restricted or restricted by the change of part of speech. The infinitive belongs to the form of non-predicate verbs.

Basic form: to+ pattern

Negative form: not before to

Question form: question word +to+ verb d

Passive form: to be+ past participle

Complete form: you+past participle

Infinitive as subject

1. Seeing is believing. ? (This situation is not often used)

It is very important to learn English well.

This is a formal topic, and the real topic is to learn English well. This usage is commonly used, it is a test center!

Infinitive as predicative:? It is often said that the content, nature and characteristics of the subject or table action will occur.

1. My job is to ensure the safety of children.

My task is to type this article.