Co-Teaching: Adverbs!

Johnathan and I have begun some co-teaching.  When it comes to teaching grammar ..... well co-teaching is a great way to help students understand the concepts.  Okay, let´s get real..... When one is a teenager learning English, how important is it that an adverb such as ¨never¨comes after the verb ¨to be¨and before every other verb!