系动词和谓语动词的区别?
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系动词属于表语动词,也就是说出现了系动词,这个句型就是主+系+表结构了.而由谓语动词(又称实义动词)构成的句子则是主+谓+宾结构.比较大的区别是,当系动词是be动词(be动词时系动词的一类)时,变否定/疑问句时不需助动词;而当动词是谓语动词是变否定/疑问句则需要助动词.例如He is a student. He isn't a student. Is he a student?He likes sports. He doens't like sports. Does he like sports?