1、使役动词是表示使，令，让，帮，叫等意义的不完全及物动词，主要有make使，令；

2、使役动词后接受词，再接原形不定词作受词补语。He made me laugh.他使我发笑；

3、使役动词还可以接过去分词作受词补语。I have my hair cut every month.我每个月理发;

4、使役动词的被动语态的受词补语用不定词，不用原形不定词。被动句：He made me laugh.他使我笑了，主动局：I was made to laugh by him.我被他逗笑了。