英语中动词,形容词,副词,名词,代词等在句子中分别做什么成分答:watch), modal verbs (e.g., can, may, shall, need), and the verb "to be" (am, is, are). Action verbs and the verb "to be" typically serve as the predicate in a sentence. Modal verbs are followed by the base form of the verb and function as the predicate.2...