English verb conjugation
COULD HALT

Regular verb: halt - halted - halted

Affirmation

Simple form	V-ing form
I could halt you could halt he could halt we could halt you could halt they could halt	I could be halting you could be halting he could be halting we could be halting you could be halting they could be halting
Perfect	V-ing perfect
I could have halted you could have halted he could have halted we could have halted you could have halted they could have halted	I could have been halting you could have been halting he could have been halting we could have been halting you could have been halting they could have been halting

Negation

Simple form	V-ing form
I couldn't halt you couldn't halt he couldn't halt we couldn't halt you couldn't halt they couldn't halt	I couldn't be halting you couldn't be halting he couldn't be halting we couldn't be halting you couldn't be halting they couldn't be halting
Perfect	V-ing perfect
I couldn't have halted you couldn't have halted he couldn't have halted we couldn't have halted you couldn't have halted they couldn't have halted	I couldn't have been halting you couldn't have been halting he couldn't have been halting we couldn't have been halting you couldn't have been halting they couldn't have been halting

Interrogative form

Simple form	V-ing form
could I halt? could you halt? could he halt? could we halt? could you halt? could they halt?	could I be halting? could you be halting? could he be halting? could we be halting? could you be halting? could they be halting?
Perfect	V-ing perfect
could I have halted? could you have halted? could he have halted? could we have halted? could you have halted? could they have halted?	could I have been halting? could you have been halting? could he have been halting? could we have been halting? could you have been halting? could they have been halting?

Interro-negative form

Simple form	V-ing form
couldn't I halt? couldn't you halt? couldn't he halt? couldn't we halt? couldn't you halt? couldn't they halt?	couldn't I be halting? couldn't you be halting? couldn't he be halting? couldn't we be halting? couldn't you be halting? couldn't they be halting?
Perfect	V-ing perfect
couldn't I have halted? couldn't you have halted? couldn't he have halted? couldn't we have halted? couldn't you have halted? couldn't they have halted?	couldn't I have been halting? couldn't you have been halting? couldn't he have been halting? couldn't we have been halting? couldn't you have been halting? couldn't they have been halting?