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必修5《Grammar》集体备课PPT课件优质课下载
Past perfect
Past continuous
bear beat ?begin ?
choose dig
beat beaten
began begun
bore born
dug dug
chose chosen
fall feed ?fly ?forget ?freeze ?
fell fallen?
fed fed
flew flown
forgot forgotten
froze frozen
hear ?hide ?hit
hold ?hurt ?
heard heard
hid hidden
hit hit?
held held
hurt hurt
lay
learn ?leave ?let ?lie ?
laid laid?