The sentence presented is an infinitive sentence, as shown in the first answer option.
What is an infinitive sentence?
- Sentences that have verbs in the infinitive.
- Sentences that present words of other grammatical classes that complement the infinitive action.
A verb is a word that presents an action, a state, or a phenomenon of nature. The verb is in the infinitive mood when it is followed by the word "to", as we can see in the sentence above, in the verb "to understand."
Learn more about verbs at the link:
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