Observe os pares de sentenças (X) e (Y). Assinale a opção correta. X Y The students walked to school.

The children have walked to school. The cat meowed. The cat has meowed. He was sick. He had been sick. Sentences in X are in the simple past. Sentences in Y are in the past participle. Sentences in X are in the simple past. Sentences in Y are in the past perfect. Sentences in X are in the past tense. Irregular verbs in the past indicate time (past) and aspect (completion). Sentences in Y are in the present perfect ou past perfect. The auxiliary to have is inflected for tense and works together with the past participle to form verb phrases that indicate time (past) and aspect (completion). Sentences in Y are in the past perfect. The auxiliary to have is inflected for tense and works together with the past participle to form verb phrases that indicate time (past) and aspect (completion).

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