English verb conjugation
COULD SQUINT

Regular verb: squint - squinted - squinted

Affirmation

Simple form	V-ing form
I could squint you could squint she could squint we could squint you could squint they could squint	I could be squinting you could be squinting she could be squinting we could be squinting you could be squinting they could be squinting
Perfect	V-ing perfect
I could have squinted you could have squinted she could have squinted we could have squinted you could have squinted they could have squinted	I could have been squinting you could have been squinting she could have been squinting we could have been squinting you could have been squinting they could have been squinting

Negation

Simple form	V-ing form
I couldn't squint you couldn't squint she couldn't squint we couldn't squint you couldn't squint they couldn't squint	I couldn't be squinting you couldn't be squinting she couldn't be squinting we couldn't be squinting you couldn't be squinting they couldn't be squinting
Perfect	V-ing perfect
I couldn't have squinted you couldn't have squinted she couldn't have squinted we couldn't have squinted you couldn't have squinted they couldn't have squinted	I couldn't have been squinting you couldn't have been squinting she couldn't have been squinting we couldn't have been squinting you couldn't have been squinting they couldn't have been squinting

Interrogative form

Simple form	V-ing form
could I squint? could you squint? could she squint? could we squint? could you squint? could they squint?	could I be squinting? could you be squinting? could she be squinting? could we be squinting? could you be squinting? could they be squinting?
Perfect	V-ing perfect
could I have squinted? could you have squinted? could she have squinted? could we have squinted? could you have squinted? could they have squinted?	could I have been squinting? could you have been squinting? could she have been squinting? could we have been squinting? could you have been squinting? could they have been squinting?

Interro-negative form

Simple form	V-ing form
couldn't I squint? couldn't you squint? couldn't she squint? couldn't we squint? couldn't you squint? couldn't they squint?	couldn't I be squinting? couldn't you be squinting? couldn't she be squinting? couldn't we be squinting? couldn't you be squinting? couldn't they be squinting?
Perfect	V-ing perfect
couldn't I have squinted? couldn't you have squinted? couldn't she have squinted? couldn't we have squinted? couldn't you have squinted? couldn't they have squinted?	couldn't I have been squinting? couldn't you have been squinting? couldn't she have been squinting? couldn't we have been squinting? couldn't you have been squinting? couldn't they have been squinting?