GRAMMAR
A / AN: https://blogs.e-me.edu.gr/hive-ddea-c-engl/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/
VERBS TO BE, TO DO, TO HAVE: https://blogs.e-me.edu.gr/hive-ddea-c-engl/verbs-to-be-to-do-to-have/
PRESENT CONTINUOUS: https://blogs.e-me.edu.gr/hive-ddea-c-engl/present-continuous/