At ECU, the beginning German students get three(?) books:
* A textbook to teach them German.
* A workbook to practice German.
* English Grammar for Students of German to teach them English grammar.

No, really. 'Chapter 7: What is a Verb?' 'Chapter 15: What is a Sentence?'

Sadly, this book really is needed. Okay, we all know what a verb is (I hope), but often people find themselves unable to define 'infinitive' or 'modal verb', though usually I suspect they can give examples.

But that courses for teaching American college students German must also teach the Americans English is sad.

On Saturday, Charles and I were petting a dog¹ and Charles commented 'Don't you wish you smelled as good as a dog?'

It took me a moment to understand what the hell he meant. Sure, this dog was quite clean (though her breath was awful), but...why would I want to smell like her?

Charles has now been educated as to the difference between 'good' and 'well'. These are different words with different meaning.

Now if only people would learn to adverbalise the rest of their adverbs. These Things Matter.

¹ 84% wolf, say the owners. I find that very unlikely. 87.5%, maybe.