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形态 时间 一般 进行 完成 现在 am/is/are cleaned am/is/are being cleaned have/has been cleaned 形态 时间 一般 进行 完成 过去 was/were cleaned was/were being cleaned had been cleaned 将来 shall/will be cleaned shall/will have been cleaned 过去将来 should/would be cleaned [典题精选] [我来改正] [常设误点] [典题精选] [我来改正] [常设误点] 情况 变化规则 例词 一般情况 直接加s work—works learn—learns come—comes play—plays want—wants need—needs 情况 变化规则 例词 结尾为s，x，sh，ch或o 在词尾加es pass—passes discuss—discusses teach—teaches wash—washes fix—fixes go—goes 结尾为“辅音字母＋y” 变y为i再加es carry—carries cry—cries study—studies worry—worries 情况 变化规则 例词 一般情况 在动词后加ed look—looked watch—watched stay—stayed expect—expected 以e结尾的动词 后加d hope—hoped like—liked 情况 变化规则 例词 以“辅音字母＋y”结尾的动词 变y为i再加ed study—studied try—tried copy—copied carry—carried 以重读闭音节或/r/音节结尾，词尾只有一个辅音字母时 双写词尾的辅音字母再加ed stop—stopped clap—clapped plan—planned prefer—preferred admit—admitted permit—permitted 情况 变化规则 例词 一般情况 在词尾直接加ing work—working look—looking study—studying 以不发音的e结尾的动词 去e再加ing have—having face—facing take—taking | 
