As a challenge, teach grammar points in English.
作为一个挑战，用英语去教语法点。
You can explain grammar points in Chinese as much as is necessary.
你可以根据需要，用汉语来解释语法点。
Just pay attention to some small grammar points when you are speaking.
只要注意一些小的语法点，当你说话。
Acknowledge the grammar about simple present: Be. Review the past language points.
掌握一般现在时语法。复习学过的语言点。
These three major grammar theories have their own strong points and weaknesses.
这三种语法理论，各有优劣。
These three major grammar theories have their own strong points and weaknesses.
这三种语法理论，各有优劣。
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