What are the non-predicate verbs?

There are three forms of non-predicate verbs: infinitive, gerund and participle.

According to grammatical rules, infinitives can act as subject, object, predicative, attribute, object complement and adverbial in sentences; Gerund can be used as subject, object, predicative and attributive in a sentence, and now participle can be used as predicative, attributive, object complement and adverbial in a sentence; Past participles act as predicative, attributive, object complement and adverbial in sentences.

In English language rules, simple sentences express a complete semantics as a whole and use subject-predicate structure. But there are many verbs in the sentence, only one predicate verb has no conjunction, so the other verbs are non-predicate verbs. These non-predicate verbs act as components other than predicates in sentences: subject, object, predicate, attribute, adverbial, complement and so on.

The specific form is as follows:

1, infinitive: to do (for initiative, usually for the future)

The teacher told us to do morning exercises. The teacher asked us to do morning exercises.

2. Gerund: do (show initiative)

It will be common for ordinary people to travel in space in the future. In the future, it will be common for ordinary people to travel in space.

3. Present participle: do (indicating initiative and progress)

He sat there, reading the newspaper. He sat there, reading the newspaper.

4. past participle: done

The past participle of transitive verbs indicates passivity or completion; The past participle of intransitive verbs indicates initiative or completion.