英語小天使說:不定詞可當主詞 S(To V) + V…. To argue with my father is a waste of time. = It’s a waste of time to argue with my father. 跟我父親爭辯是浪費時間。 To keep early hours is good for health. = It’s good for health to keep early hours. 早睡早起有益健康。
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