SIMPLE PAST TENSE

1. USAGE

1.1. Describe a concrete past action

1.2. Action with a result in the past

1.3. Actions , situations, or events that ended in the past

2. MAIN VERB "IS"

2.1. Singular "WAS"

2.1.1. I was at home last week.

2.2. Plural "WERE"

2.2.1. We were in a meeting last month.

3. I followed you on Instagram.

4. VERBS

4.1. Regular

4.1.1. doesn't change

4.1.1.1. changed

4.2. Irregular

4.2.1. change

5. STRUCTURES

5.1. Positive

5.2. Negative

5.2.1. I did not follow you on Instagram.

5.2.1.1. main verb in its base form

5.2.1.2. Insert "not"

5.3. Question

5.3.1. Did I follow you on Instagram?

6. USE OF AUXILIARY "DID"