English verb conjugation
COULD RESTRAIN

Regular verb: restrain - restrained - restrained

Affirmation

Simple form	V-ing form
I could restrain you could restrain he could restrain we could restrain you could restrain they could restrain	I could be restraining you could be restraining he could be restraining we could be restraining you could be restraining they could be restraining
Perfect	V-ing perfect
I could have restrained you could have restrained he could have restrained we could have restrained you could have restrained they could have restrained	I could have been restraining you could have been restraining he could have been restraining we could have been restraining you could have been restraining they could have been restraining

Negation

Simple form	V-ing form
I couldn't restrain you couldn't restrain he couldn't restrain we couldn't restrain you couldn't restrain they couldn't restrain	I couldn't be restraining you couldn't be restraining he couldn't be restraining we couldn't be restraining you couldn't be restraining they couldn't be restraining
Perfect	V-ing perfect
I couldn't have restrained you couldn't have restrained he couldn't have restrained we couldn't have restrained you couldn't have restrained they couldn't have restrained	I couldn't have been restraining you couldn't have been restraining he couldn't have been restraining we couldn't have been restraining you couldn't have been restraining they couldn't have been restraining

Interrogative form

Simple form	V-ing form
could I restrain? could you restrain? could he restrain? could we restrain? could you restrain? could they restrain?	could I be restraining? could you be restraining? could he be restraining? could we be restraining? could you be restraining? could they be restraining?
Perfect	V-ing perfect
could I have restrained? could you have restrained? could he have restrained? could we have restrained? could you have restrained? could they have restrained?	could I have been restraining? could you have been restraining? could he have been restraining? could we have been restraining? could you have been restraining? could they have been restraining?

Interro-negative form

Simple form	V-ing form
couldn't I restrain? couldn't you restrain? couldn't he restrain? couldn't we restrain? couldn't you restrain? couldn't they restrain?	couldn't I be restraining? couldn't you be restraining? couldn't he be restraining? couldn't we be restraining? couldn't you be restraining? couldn't they be restraining?
Perfect	V-ing perfect
couldn't I have restrained? couldn't you have restrained? couldn't he have restrained? couldn't we have restrained? couldn't you have restrained? couldn't they have restrained?	couldn't I have been restraining? couldn't you have been restraining? couldn't he have been restraining? couldn't we have been restraining? couldn't you have been restraining? couldn't they have been restraining?