记忆卡片

A regular verb maintains its base spelling and adds standard endings rather than transforming into an unpredictable word. In the present simple, it adds -s or -es for third-person singular subjects to convey recurring habits or permanent conditions. In the past simple, it adds -ed across all grammatical subjects to signal an action completed at a definite earlier time.

Dr. Alvarez examines several patients each morning and examined ten cases yesterday.