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be動詞后常用ing形式,為現在完成時.但有時加ed為被動語態.play後面也加ing形式.形容詞,名詞後面通常加to.其實,當你做題時,要翻譯句子,了解時態,如一般現在是,一般將來時,現在進行時,過去進行時等等,時態對了,形式也...
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