English verb conjugation
COULD HALT

Regular verb: halt - halted - halted

Affirmation

Simple form	V-ing form
I could halt you could halt she could halt we could halt you could halt they could halt	I could be halting you could be halting she 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 she 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 she 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 she 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 she 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 she 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 she 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 she halt? could we halt? could you halt? could they halt?	could I be halting? could you be halting? could she 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 she 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 she 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 she 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 she 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 she 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 she have been halting? couldn't we have been halting? couldn't you have been halting? couldn't they have been halting?