
But I appeal to you as a scholar to take a second look at such constructions as, "There is some eggs." and, "Can I have a coffee?" These are not, in my opinion, ungrammatical, and you will surely do your students no harm to explore these sentences with them. Quite the contrary. A deeper understanding of this area will enhance their English skills (and maybe yours). While I imagine there may be some controversy over this, I'm willing to bet I'd have a lot of support from some very heavy hitters in academia. Please consider again the notion of what is grammatical and what is not. I assure you that just because some textbook on English grammar makes an assertion about what is correct, that is by no means the last word on the subject, especially nowadays with the availability of corpus-based information about English.
Larry Latham