剑桥词典in a clause , the verb that contains the meaning , compared with any auxiliary verbs that go with it 主要動詞（句子中與助動詞相比較有意義的動詞） In "I should have been studying ", "studying " is the main verb . 在 I should have been studying 這個句子中，studying 是主要動詞。 返回 main verb