The form of action/ sentence that the subject is a doer
- I kick John
- He loves me
- Present Simple -- I teach him.
- Present Continuous -- I am teaching him.
- Present Perfect -- I have taught him.
- Past Simple -- I taught him.
- Past Continuous -- I was teaching him.
- Past Perfect -- I had taught him.
- Future Simple -- I will teach him.
- Future Continuous -- I will be teaching him.
- Future Perfect -- I will have taught him.