Resposta:
1. Irregular, pois sua forma no passado não apresenta -ed no final.
2. Porque a última sílaba do verbo é a mais forte (sílaba tônica) e o verbo termina com consoante + vogal + consoante
3. Interrogative: Did we know about street meetings?
Negative: We didn't know about street meetings.
4. "We will only have time to hear from two of them."
5. Interrogative: Was President Ballard one of two missionaries selected by his mission president?
Negative: President Ballard wasn't one of two missionaries selected by his mission president.
