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DO和DOES的用法疑问!Thetwinbrothersgotoschoolbybus.改为否定句用DOsamhasdinnerattherestaurant.改为否定句用DOES上面两句话作为对比,我想问,这两句话主词是不是名词呢?我感觉两句话都是第三人称,

题目详情
DO和DOES的用法疑问!
The twin brothers go to school by bus.改为否定句用DO
sam has dinner at the restaurant.改为否定句用DOES
上面两句话作为对比,我想问,这两句话主词是不是名词呢?我感觉两句话都是第三人称,为什么sam改用DOES,而双胞胎用DO呢?
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答案和解析
The twin brothers go to school by bus,改否定句为The twin brothers don't go to school by bus.是因为 兄弟是复数,是复数的助动词用do 此句主语为The twin brotherssam has dinner at the restaurant.改 否定句为Sam doesn't have dinner at the restaurant.是因为Sam是第三人称单数,助动词用does 此句主语为Sam希望采纳,