(1)清辅音后读/s/ 如: maps books likes (2)浊辅音后读/z/ 如: bags leaves (3)元音后读/z/ 如: plays teachers (4)如名词/动词的原形本身是以/s/、/z/读音结尾的，后加的-s/-es读/iz/
如:buses boxes oranges watches washes (5)特殊的，以/ʃ/、/tʃ/、/dʒ/结尾的，后加的-s/-es读/s/ 2.-ed发音规律（动词过去式/过去分词的变化形式）
(1)清辅音后读/t/ 如: watched stopped (2)浊辅音后读/d/ 如: saved recognized (3)元音后读/d/ 如: played referred (4)如动词的原形本身是以/t/、/d/读音结尾的，后加的-d/-ed读/id/ 如: wanted surrounded
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