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, watches , fishes baby— babies , country— countries tomatoes , potatoes knife— knives , leaf— leaves 你看出規(guī)律了嗎? “ S” s,x,ch,sh,ss結(jié)尾的單詞,必須加上 es +y結(jié)尾的單詞,把 Y變成 i再加 es +O結(jié)尾的單詞,后加 es( photo除外) f或 fe結(jié)尾的單詞。 Mike’s father Jim’s class my mother’s name ,則每個(gè)名詞都要加 ’ s,后面的可數(shù)名詞要用復(fù)數(shù)形式。 Jim and Tom’s ruler Mary and Kate’s cases s結(jié)尾的復(fù)數(shù)名詞加 ’ the teachers’ room s結(jié)尾的復(fù)數(shù)名詞加 ’ s men’s shoes Women’s Day Those are erasers. Are those erasers? Yes, they are./ No, they aren’t. They are girls. Are they girls? Yes, they are. / No, they aren’t. Those are not erasers. They are not girls. (單) This is a book These are books. → → (單) That is his brother. → Those are