English verb conjugation
COULD IMPERIL

Regular verb: imperil - imperilled - imperilled

Affirmation

Simple form	V-ing form
I could imperil you could imperil he could imperil we could imperil you could imperil they could imperil	I could be imperilling you could be imperilling he could be imperilling we could be imperilling you could be imperilling they could be imperilling
Perfect	V-ing perfect
I could have imperilled you could have imperilled he could have imperilled we could have imperilled you could have imperilled they could have imperilled	I could have been imperilling you could have been imperilling he could have been imperilling we could have been imperilling you could have been imperilling they could have been imperilling

Negation

Simple form	V-ing form
I couldn't imperil you couldn't imperil he couldn't imperil we couldn't imperil you couldn't imperil they couldn't imperil	I couldn't be imperilling you couldn't be imperilling he couldn't be imperilling we couldn't be imperilling you couldn't be imperilling they couldn't be imperilling
Perfect	V-ing perfect
I couldn't have imperilled you couldn't have imperilled he couldn't have imperilled we couldn't have imperilled you couldn't have imperilled they couldn't have imperilled	I couldn't have been imperilling you couldn't have been imperilling he couldn't have been imperilling we couldn't have been imperilling you couldn't have been imperilling they couldn't have been imperilling

Interrogative form

Simple form	V-ing form
could I imperil? could you imperil? could he imperil? could we imperil? could you imperil? could they imperil?	could I be imperilling? could you be imperilling? could he be imperilling? could we be imperilling? could you be imperilling? could they be imperilling?
Perfect	V-ing perfect
could I have imperilled? could you have imperilled? could he have imperilled? could we have imperilled? could you have imperilled? could they have imperilled?	could I have been imperilling? could you have been imperilling? could he have been imperilling? could we have been imperilling? could you have been imperilling? could they have been imperilling?

Interro-negative form

Simple form	V-ing form
couldn't I imperil? couldn't you imperil? couldn't he imperil? couldn't we imperil? couldn't you imperil? couldn't they imperil?	couldn't I be imperilling? couldn't you be imperilling? couldn't he be imperilling? couldn't we be imperilling? couldn't you be imperilling? couldn't they be imperilling?
Perfect	V-ing perfect
couldn't I have imperilled? couldn't you have imperilled? couldn't he have imperilled? couldn't we have imperilled? couldn't you have imperilled? couldn't they have imperilled?	couldn't I have been imperilling? couldn't you have been imperilling? couldn't he have been imperilling? couldn't we have been imperilling? couldn't you have been imperilling? couldn't they have been imperilling?