HOW TO LEARN CHINESE GRAMMAR

大家好，我是一名越南华侨，从小就在越南长大。日常跟父母讲广东话的。汉语水平也一般。最近我有一位同事请我教他汉语，一开始我想应该没问题。后来才发现我的语法知识原来只是皮毛。我想充实一下自己的语法，请问有哪一本能学习这知识吗？
Hello everyone, I am a Vietnamese overseas Chinese who grew up in Vietnam. I speak Cantonese with my parents every day. The level of Chinese is also average. Recently a colleague of mine asked me to teach him Chinese, and at first I thought it would be okay. Later I discovered that my knowledge of grammar was only superficial. I want to improve my grammar. Is there any book that can help me learn this knowledge?