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 couldn't tithe you couldn't tithe he couldn't tithe we couldn't tithe you couldn't tithe they couldn't tithe	I couldn't be tithing you couldn't be tithing he couldn't be tithing we couldn't be tithing you couldn't be tithing they couldn't be tithing
Perfect	V-ing perfect
I couldn't have tithed you couldn't have tithed he couldn't have tithed we couldn't have tithed you couldn't have tithed they couldn't have tithed	I couldn't have been tithing you couldn't have been tithing he couldn't have been tithing we couldn't have been tithing you couldn't have been tithing they couldn't 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
couldn't I tithe? couldn't you tithe? couldn't he tithe? couldn't we tithe? couldn't you tithe? couldn't they tithe?	couldn't I be tithing? couldn't you be tithing? couldn't he be tithing? couldn't we be tithing? couldn't you be tithing? couldn't they be tithing?
Perfect	V-ing perfect
couldn't I have tithed? couldn't you have tithed? couldn't he have tithed? couldn't we have tithed? couldn't you have tithed? couldn't they have tithed?	couldn't I have been tithing? couldn't you have been tithing? couldn't he have been tithing? couldn't we have been tithing? couldn't you have been tithing? couldn't they have been tithing?