grammar

A/An: https://blogs.e-me.edu.gr/hive-dgea-7thgrade-engl-advanced/a-an/

This/That/These/Those: https://blogs.e-me.edu.gr/hive-ddea-c-engl/this-that-these-those/

There is/There are: https://blogs.e-me.edu.gr/hive-ddea-c-engl/there-is-there-are/

Plural: