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What are predicate verbs and non-predicate verbs?
Predicate verbs refer to verbs that can act as predicates independently in a sentence, mainly by notional verbs. In addition, some verb phrases can also be predicate verbs. In English, verbs are mainly divided into two categories according to their functions, one is predicate verbs and the other is non-predicate verbs.

Non-predicate verbs, also known as non-predicate verbs, refer to verbs that are not predicates in sentences, mainly including infinitives, gerunds and participles (present participles and past participles), that is, the non-predicate forms of verbs. Non-predicate verbs can not only act as predicates independently, but also carry other components of the sentence.

Extended data

Three forms of non-predicate:

Now participle/gerund: -ing

Past participle: -ed

Infinitive-do

Therefore, how to distinguish predicate verbs can start from the following two points:

1, verbs other than the above three distinct non-predicate verbs are predicate verbs;

2. If there is a difference between the past and the future (tense can be said), or a modal verb opens the way, or a prototype (except for the special verb-object complement structure), it must be a predicate verb.

However, the -ed form of verbs can be either past tense or past participle. Discrimination: very simple, the rules are as follows: if it is an intransitive verb, the ed form is the predicate; If it is a transitive verb, the ed form with an object is a predicate, and the one without an object is a non-predicate.

Baidu Encyclopedia-Predicate Verb

Baidu Encyclopedia-Non-predicate Verb