I am new to the forum and was hoping that a kind soul out there could help me out.
At the present time I am doing the Trinity TESOL course. Part of the course requirement is to profile a student.
The profile contains numerous things which I can get my head around, but there are a couple of things that I know it seems daft but I can't quite work out the differences between them.
I have to write about: how a student uses singular and plural forms
and then follow this with
How a student uses countable and uncountable nouns.
Could someone explain the difference between the two as I am stumped. I know what a plural and singular form is etc but the line between these two subjects appears to be very thin.

Then the final thing that I am stuck on is
Verbs and tense forms
Use of tenses
Again what in the heck is the difference

I know this sounds thick but I can not for the life of think what is meant and how I distinguish between the two.
Thanks for any help. It is most appreciated

Jools