英语中怎么把肯定句变成疑问句、否定句?
3个回答

否定句：在谓语动词前加助动词don't,如果是第三人称单数作主语,则在谓语动词前加doesn't；如果是系动词Be,则根据人称,直接说aren't 或isn't.如：We go to school every day.改为否定句为：We don't go to school every day.He goes to school every day.改为否定句：He doesn't go to school every day.We are workers.改为否定句：We aren't workers.He is a student.改为否定句：He isn't a student.I am a student.改为否定句：I'm not a student.一般疑问句：把助动词或系动词be放于句首.如：Does he go to work every day?Do you go to work every day?Is he a student?Are you workers?/ Are you a worker?

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