English verb conjugation
COULD NETTLE

Regular verb: nettle - nettled - nettled

Affirmation

Simple form	V-ing form
I could nettle you could nettle he could nettle we could nettle you could nettle they could nettle	I could be nettling you could be nettling he could be nettling we could be nettling you could be nettling they could be nettling
Perfect	V-ing perfect
I could have nettled you could have nettled he could have nettled we could have nettled you could have nettled they could have nettled	I could have been nettling you could have been nettling he could have been nettling we could have been nettling you could have been nettling they could have been nettling

Negation

Simple form	V-ing form
I couldn't nettle you couldn't nettle he couldn't nettle we couldn't nettle you couldn't nettle they couldn't nettle	I couldn't be nettling you couldn't be nettling he couldn't be nettling we couldn't be nettling you couldn't be nettling they couldn't be nettling
Perfect	V-ing perfect
I couldn't have nettled you couldn't have nettled he couldn't have nettled we couldn't have nettled you couldn't have nettled they couldn't have nettled	I couldn't have been nettling you couldn't have been nettling he couldn't have been nettling we couldn't have been nettling you couldn't have been nettling they couldn't have been nettling

Interrogative form

Simple form	V-ing form
could I nettle? could you nettle? could he nettle? could we nettle? could you nettle? could they nettle?	could I be nettling? could you be nettling? could he be nettling? could we be nettling? could you be nettling? could they be nettling?
Perfect	V-ing perfect
could I have nettled? could you have nettled? could he have nettled? could we have nettled? could you have nettled? could they have nettled?	could I have been nettling? could you have been nettling? could he have been nettling? could we have been nettling? could you have been nettling? could they have been nettling?

Interro-negative form

Simple form	V-ing form
couldn't I nettle? couldn't you nettle? couldn't he nettle? couldn't we nettle? couldn't you nettle? couldn't they nettle?	couldn't I be nettling? couldn't you be nettling? couldn't he be nettling? couldn't we be nettling? couldn't you be nettling? couldn't they be nettling?
Perfect	V-ing perfect
couldn't I have nettled? couldn't you have nettled? couldn't he have nettled? couldn't we have nettled? couldn't you have nettled? couldn't they have nettled?	couldn't I have been nettling? couldn't you have been nettling? couldn't he have been nettling? couldn't we have been nettling? couldn't you have been nettling? couldn't they have been nettling?