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动词加ing的变化规则：1．一般情况下直接加ing2．以不发音的e结尾去e加ing3．重读闭音节的双写最后一个字母加ing动词第三人称单数的变化规则1．一般情况下直接加-s2．以s，x，sh，ch，o结尾加-es3．以“辅音字母+y”结尾变y为i再加-es请写出下列动词的ing形式和第三人称单数形式clean____________________sing____________________read____________________walk____________________take____________________live____________________come____________________have____________________like____________________write____________________make____________________skate____________________dance____________________cook____________________swim____________________run____________________wash____________________watch____________________teach____________________go____________________do____________________fly____________________study____________________play____________________