answer question
It is called the infinitive.
The verb in the sentence is "appears." It is the action being described in the sentence.
Appears. Appears is a form of the verb appear
appears
it is a linking verb
No, it is not a preposition. Appears is a form of the verb appear.
An infinitive form of a verb is a non-finite verb form that typically appears with the word "to" before the base verb. For example, "to run," "to swim," or "to eat."
must - is called a modal auxiliary verb, must always goes before a main verb in this sentence the main verb is tripped. have - is an auxiliary verb in this sentence. Both of these can be called helping verbs
verb because it is a "doing" word
When an adverb comes immediately before the verb in a sentence, it is called "prepositional adverb placement," which aims to provide emphasis or clarify the action happening.
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if adverb is placed not exactly after or before the verb then it is called predicate adverb.