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一般情况,直接+ing,例:work,working 以不發音的e結尾,去e+ing,例:hope,hoping;write,writing 以ie結尾,去ie變y+ing,例:die,dying;lie,lying;tie,tying 以重讀閉音節結尾,末尾只有一個輔音字母的動詞,雙寫輔音字母+ing,例:begin,beginning;swim,swimming;run,running
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