I was amazed at his extraordinary talent.

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A verb plays the role of expressing actions or states in a sentence.

We should utilize this new technology to the fullest.

He received the letter challenging him to a duel and began preparing for the duel.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

It's a bit difficult to remember the conjugation of the lower monograde.

School grammar is the foundation of Japanese education.

His Japanese sentences have many grammar mistakes.