I want to completely master and natural use grammar rules.

我想完完全全地掌握语法规则和非常自然地使用语法规则！

youdao

I want to completely master and naturally use grammar rules.

我想完完全全地掌握和非常自然地使用语法规则！

youdao

Do you want to completely master and naturally use grammar rules?

你想彻底掌握并自如运用语法规则吗？

youdao

The top floors, accessible by both an interior staircase and a metal staircase outside, is dedicated completely to a master bedroom suite.

FORBES: A Penthouse-Style Apartment On The Ground Floor (VIDEO)