英语中do和be动词的提问有什么区别

英语中do和be动词的提问有什么区别

do 和be都可以作实意动词和助动词。如果句子中的动词是实意动词,一般用助动词do进行提问,或者变为否定句。助动词do可以构成疑问句、否定句、倒装句、或者强调祈使句。系动词be后跟表语（形容词、作表语的副词、名词、代词、数词、介词短语、分词、不定式、动名词、表语从句等）, 助动词be可以构成进行时，被动语态，there be 结构。如：
They work hard. Do they work hard? What do they learn? They don't work hard. Do be quiet! Never do they come late.
He is ill. He is a teacher. He is in the room. He is out. His job is to tend the woman. Five plus two is eight. He is excited. The news is exciting. He is killed. There is a pen on the desk. They are planting trees.