Pronouncing the “-ed” ending.

This lesson is derived from www.grammar.cl

Prepositions: “in” “on” “at”

Quick lesson on these important prepositions: “in” “on” “at”

To use “the” or not to use “the”? The definite article in English

Lesson about using the definite article (“the”) from www.edufind.com

Nation / the adjective / a person: The United States / American / An American

I recommend this lesson from www.edufind.com

Choosing between present perfect and past simple verb tense.

I recommend this lesson from www.perfect-english-grammar.com