I have devoted four weekends to

参考答案:

答案A知识点动词的定义动词的定义：表示动作中状态的词叫做动词。根据其在句中的功能，动词可分为行为动词、系动词、助动词和情态动词四类，有些动词是兼类词。例如：We have lunch at 12. (have是行为动词)We have been to NewYork. (have是助动词)I am hungry. (am是系动词)You need not have waited for me. (need是情态动词)The door needs painting. (need是兼类词)