English verb conjugation
COULD ISLE

Regular verb: isle - isled - isled

Affirmation

Simple form	V-ing form
I could isle you could isle she could isle we could isle you could isle they could isle	I could be isling you could be isling she could be isling we could be isling you could be isling they could be isling
Perfect	V-ing perfect
I could have isled you could have isled she could have isled we could have isled you could have isled they could have isled	I could have been isling you could have been isling she could have been isling we could have been isling you could have been isling they could have been isling

Negation

Simple form	V-ing form
I couldn't isle you couldn't isle she couldn't isle we couldn't isle you couldn't isle they couldn't isle	I couldn't be isling you couldn't be isling she couldn't be isling we couldn't be isling you couldn't be isling they couldn't be isling
Perfect	V-ing perfect
I couldn't have isled you couldn't have isled she couldn't have isled we couldn't have isled you couldn't have isled they couldn't have isled	I couldn't have been isling you couldn't have been isling she couldn't have been isling we couldn't have been isling you couldn't have been isling they couldn't have been isling

Interrogative form

Simple form	V-ing form
could I isle? could you isle? could she isle? could we isle? could you isle? could they isle?	could I be isling? could you be isling? could she be isling? could we be isling? could you be isling? could they be isling?
Perfect	V-ing perfect
could I have isled? could you have isled? could she have isled? could we have isled? could you have isled? could they have isled?	could I have been isling? could you have been isling? could she have been isling? could we have been isling? could you have been isling? could they have been isling?

Interro-negative form

Simple form	V-ing form
couldn't I isle? couldn't you isle? couldn't she isle? couldn't we isle? couldn't you isle? couldn't they isle?	couldn't I be isling? couldn't you be isling? couldn't she be isling? couldn't we be isling? couldn't you be isling? couldn't they be isling?
Perfect	V-ing perfect
couldn't I have isled? couldn't you have isled? couldn't she have isled? couldn't we have isled? couldn't you have isled? couldn't they have isled?	couldn't I have been isling? couldn't you have been isling? couldn't she have been isling? couldn't we have been isling? couldn't you have been isling? couldn't they have been isling?