English verb conjugation
COULD OVERTAX

Regular verb: overtax - overtaxed - overtaxed

Affirmation

Simple form	V-ing form
I could overtax you could overtax she could overtax we could overtax you could overtax they could overtax	I could be overtaxing you could be overtaxing she could be overtaxing we could be overtaxing you could be overtaxing they could be overtaxing
Perfect	V-ing perfect
I could have overtaxed you could have overtaxed she could have overtaxed we could have overtaxed you could have overtaxed they could have overtaxed	I could have been overtaxing you could have been overtaxing she could have been overtaxing we could have been overtaxing you could have been overtaxing they could have been overtaxing

Negation

Simple form	V-ing form
I couldn't overtax you couldn't overtax she couldn't overtax we couldn't overtax you couldn't overtax they couldn't overtax	I couldn't be overtaxing you couldn't be overtaxing she couldn't be overtaxing we couldn't be overtaxing you couldn't be overtaxing they couldn't be overtaxing
Perfect	V-ing perfect
I couldn't have overtaxed you couldn't have overtaxed she couldn't have overtaxed we couldn't have overtaxed you couldn't have overtaxed they couldn't have overtaxed	I couldn't have been overtaxing you couldn't have been overtaxing she couldn't have been overtaxing we couldn't have been overtaxing you couldn't have been overtaxing they couldn't have been overtaxing

Interrogative form

Simple form	V-ing form
could I overtax? could you overtax? could she overtax? could we overtax? could you overtax? could they overtax?	could I be overtaxing? could you be overtaxing? could she be overtaxing? could we be overtaxing? could you be overtaxing? could they be overtaxing?
Perfect	V-ing perfect
could I have overtaxed? could you have overtaxed? could she have overtaxed? could we have overtaxed? could you have overtaxed? could they have overtaxed?	could I have been overtaxing? could you have been overtaxing? could she have been overtaxing? could we have been overtaxing? could you have been overtaxing? could they have been overtaxing?

Interro-negative form

Simple form	V-ing form
couldn't I overtax? couldn't you overtax? couldn't she overtax? couldn't we overtax? couldn't you overtax? couldn't they overtax?	couldn't I be overtaxing? couldn't you be overtaxing? couldn't she be overtaxing? couldn't we be overtaxing? couldn't you be overtaxing? couldn't they be overtaxing?
Perfect	V-ing perfect
couldn't I have overtaxed? couldn't you have overtaxed? couldn't she have overtaxed? couldn't we have overtaxed? couldn't you have overtaxed? couldn't they have overtaxed?	couldn't I have been overtaxing? couldn't you have been overtaxing? couldn't she have been overtaxing? couldn't we have been overtaxing? couldn't you have been overtaxing? couldn't they have been overtaxing?