英语does is区别用法?如,Dad isn not at home.为什么不是Dad does not at home.She does not come from China.为什么不是She is not come from China.（对了,come还用不用加s)

英语does is区别用法?如,Dad isn not at home.为什么不是Dad does not at home.She does not come from China.为什么不是She is not come from China.（对了,come还用不用加s)
英语does is区别用法?
如,Dad isn not at home.为什么不是Dad does not at home.She does not come from China.为什么不是She is not come from China.（对了,come还用不用加s)

英语does is区别用法?如,Dad isn not at home.为什么不是Dad does not at home.She does not come from China.为什么不是She is not come from China.（对了,come还用不用加s)
Dad isn not at home.是主---系---表,at home是介词短语作表语用is与Dad 联系.而She does not come from China.是主---谓---宾come 是行为动词用does not 否定.