English verb conjugation
COULD TITHE

Regular verb: tithe - tithed - tithed

Affirmation

Simple form	V-ing form
I could tithe you could tithe he could tithe we could tithe you could tithe they could tithe	I could be tithing you could be tithing he could be tithing we could be tithing you could be tithing they could be tithing
Perfect	V-ing perfect
I could have tithed you could have tithed he could have tithed we could have tithed you could have tithed they could have tithed	I could have been tithing you could have been tithing he could have been tithing we could have been tithing you could have been tithing they could have been tithing

Negation

Simple form	V-ing form
I could not tithe you could not tithe he could not tithe we could not tithe you could not tithe they could not tithe	I could not be tithing you could not be tithing he could not be tithing we could not be tithing you could not be tithing they could not be tithing
Perfect	V-ing perfect
I could not have tithed you could not have tithed he could not have tithed we could not have tithed you could not have tithed they could not have tithed	I could not have been tithing you could not have been tithing he could not have been tithing we could not have been tithing you could not have been tithing they could not have been tithing

Interrogative form

Simple form	V-ing form
could I tithe? could you tithe? could he tithe? could we tithe? could you tithe? could they tithe?	could I be tithing? could you be tithing? could he be tithing? could we be tithing? could you be tithing? could they be tithing?
Perfect	V-ing perfect
could I have tithed? could you have tithed? could he have tithed? could we have tithed? could you have tithed? could they have tithed?	could I have been tithing? could you have been tithing? could he have been tithing? could we have been tithing? could you have been tithing? could they have been tithing?

Interro-negative form

Simple form	V-ing form
could I not tithe? could you not tithe? could he not tithe? could we not tithe? could you not tithe? could they not tithe?	could I not be tithing? could you not be tithing? could he not be tithing? could we not be tithing? could you not be tithing? could they not be tithing?
Perfect	V-ing perfect
could I not have tithed? could you not have tithed? could he not have tithed? could we not have tithed? could you not have tithed? could they not have tithed?	could I not have been tithing? could you not have been tithing? could he not have been tithing? could we not have been tithing? could you not have been tithing? could they not have been tithing?