grammatically造句

One in five undergraduates cannot write grammatically.
有1/5的本科生写作不合语法规则。

This essay is grammatically smooth and readable.
这篇作文写得还顺.

Grammatically, the Sanskrit paradigm exemplifies the concept of radical.
从语法的观点看, 梵语的变格范例明确了词根的概念.