students should learn to look up words in the dictionaries.这句话各个部分的句子成分是什么?

问题描述:

students should learn to look up words in the dictionaries.这句话各个部分的句子成分是什么?

Student 是句子的主语,should 后加动词原形learn 一起作谓语,to look up words 是不定式做宾语,in the dictionary 表地点状语