English verb conjugation
COULD HELVE

Regular verb: helve - helved - helved

Affirmation

Simple form	V-ing form
I could helve you could helve he could helve we could helve you could helve they could helve	I could be helving you could be helving he could be helving we could be helving you could be helving they could be helving
Perfect	V-ing perfect
I could have helved you could have helved he could have helved we could have helved you could have helved they could have helved	I could have been helving you could have been helving he could have been helving we could have been helving you could have been helving they could have been helving

Negation

Simple form	V-ing form
I couldn't helve you couldn't helve he couldn't helve we couldn't helve you couldn't helve they couldn't helve	I couldn't be helving you couldn't be helving he couldn't be helving we couldn't be helving you couldn't be helving they couldn't be helving
Perfect	V-ing perfect
I couldn't have helved you couldn't have helved he couldn't have helved we couldn't have helved you couldn't have helved they couldn't have helved	I couldn't have been helving you couldn't have been helving he couldn't have been helving we couldn't have been helving you couldn't have been helving they couldn't have been helving

Interrogative form

Simple form	V-ing form
could I helve? could you helve? could he helve? could we helve? could you helve? could they helve?	could I be helving? could you be helving? could he be helving? could we be helving? could you be helving? could they be helving?
Perfect	V-ing perfect
could I have helved? could you have helved? could he have helved? could we have helved? could you have helved? could they have helved?	could I have been helving? could you have been helving? could he have been helving? could we have been helving? could you have been helving? could they have been helving?

Interro-negative form

Simple form	V-ing form
couldn't I helve? couldn't you helve? couldn't he helve? couldn't we helve? couldn't you helve? couldn't they helve?	couldn't I be helving? couldn't you be helving? couldn't he be helving? couldn't we be helving? couldn't you be helving? couldn't they be helving?
Perfect	V-ing perfect
couldn't I have helved? couldn't you have helved? couldn't he have helved? couldn't we have helved? couldn't you have helved? couldn't they have helved?	couldn't I have been helving? couldn't you have been helving? couldn't he have been helving? couldn't we have been helving? couldn't you have been helving? couldn't they have been helving?