用作定语
▲～+n.
You will fail without elementary knowledge of the field.没有这方面的基本知识,你会失败的。
This is an elementary question.这是一个基本的问题。
用作表语
▲S+be+～
These words are elementary.这些单词都是基本的。
The education in that school is elementary.那所学校的教育是初级的。
The knowledge you have learned is elementary.你所学到的知识都是基础的。
The question is elementary.这个问题简单易答。
▲S+be+～+that-clause
The questions were so elementary that I answered easily.那些都是基本的问题,我轻而易举地就回答出来了。
