In English, articles are classified into three categories:
the indefinite, the definite and the zero articles.
The indefinite articles: a and an
What are tenses?
The Simple Present
The Present Continuous/Progressive
The Present Perfect Tense
The Present Perfect Continuous
The Simple Past Tense, The Past Continuous Tense
The Past Perfect Tense
The Past Perfect Continuous Tense
Simple Future Tense, The Future Perfect Tenses
Future Continuous, Subject/Verb Agreement
Angel of God, my Guardian dear.
What are verbs?
Forms of Verbs
The Passive and Active Voices