helping verbˈhelpɪŋvə:b短语¹⁴⁴⁹⁷²⁺² 基本例句 n.助动词 Long, long ago, when I was in junior high and you can tell it was a long time ago because we actually called it junior high back then, I had a teacher who did not know what a helping verb was. 很久很久以前,当我还是个初中生的时候,有一位老师不知道什么是助动词,但他却得教我们这个知识。 kekenet