SUBJUNCTIVE MODE.
Present Indefinite…………(If) he teach.
Present Imperfect………….(If) he be teaching.
Present Perfect……………(If) he have taught.
Present Perfect Continuous….(If) he have been teaching.
Past Indefinite……………(If) he taught.
Past Imperfect…………….(If) he were teaching.
Past Perfect………………(If) he had taught.
Past Perfect Continuous…….(If) he had been teaching.
Future Indefinite………….(If) he should teach.
Future Imperfect…………..(If) he should be teaching.
Future Perfect…………….(If) he should have taught.
Future Perfect Continuous…..(If) he should have been teaching.
IMPERATIVE MODE.
Present…………………..Teach [thou].
INFINITIVE MODE.
Present Indefinite…………(To) teach.
Present Imperfect………….(To) be teaching.
Present Perfect……………(To) have taught.
Present Perfect Continuous….(To) have been teaching.
PARTICIPLES.
Imperfect…………………Teaching.
Perfect…………………..Having taught.
Perfect Continuous…………Having been teaching.