助动词有 5中功能：帮助句子构成否定，疑问，事棚镇岁态，语态，强调旅亮
否定：she doesnot go to school
疑问:do you have a watch?
事态:"he has gone to school(这里 has 是 助动词，构成完成时态
语链睁态:the work has been finished
强调:I do go to school
不用区分那么清楚吧……多做阅读 培养语感比理解语法更好
英语里的助动词,在什么情况下才能使用.句型中的短语怎样才能分辨出他是动词短语,介词短语,形容词短语等等
助动词有 5中功能：帮助句子构成否定，疑问，事棚镇岁态，语态，强调旅亮
否定：she doesnot go to school
疑问:do you have a watch?
事态:"he has gone to school(这里 has 是 助动词，构成完成时态
语链睁态:the work has been finished
强调:I do go to school
不用区分那么清楚吧……多做阅读 培养语感比理解语法更好