Can you read these words ?
do—did is—was go—went fly—flew see—saw read—read
不规则变化
wash—washed watch—watched cook—cooked jump—jumped walk—walked
在清辅音后面 ed 读 / t /
play—played clean—cleaned listen—listened return--returned study—studied visit—visited
在浊辅音和元音后面 ed 读 / d / 在 / t /, / d /音后面 ed 读 / Id / 音后面