The Tenses
Here and now.
Present
The first person singular conjugation of TO BE (present tense).
I AM
Things that were.
Past
The third person singular of TO SING.
Things that will happen.
Future
The first person plural conjugation of TO BE (past tense).
We WERE
Things that have happened recently.
Present perfect
If there is only one subject in the sentence, this is the grammatical case that should be used.
Singular
Things that are still happening.
Present Continuous
If there are two or more subjects in the sentence, this is the grammatical case that should be used.
Plural