首页
›
答案
›
题库
›
慕课
›
未分类
Auxiliaries fall into three categories: （） auxiliaries, modal auxiliaries and semi-auxiliaries.
Auxiliaries fall into three categories: （） auxiliaries, modal auxiliaries and semi-auxiliaries.
正确答案：primary
标签：
英语语法
上一条：
Auxiliary “（）” is usually used to help the main verb to express negative meanings or to form questions, and sometimes to help express the emphatic affirmative.
下一条：
What is the tense and aspect of the following sentence?I was sitting in the classroom.