动词不能和动词连用,因为一个句子只能有一个谓语,所以这个动词叫谓语动词。但是谓语不仅可以由动词或动词短语充当,也可以由助动词+动词原形, 或情态动词+动词原形 构成。如:I like computer games. (v)You shouldn`t like computer games.(情态动词+ v)Do you like computer games? (助动词+ v)原句中,should就是情态动词,后面直接加动词原形。常见情态动词包括:must(have to),may,can(be able to),shall,should,could,would,might,need,dare(敢)。助动