English verb conjugation
COULD STARE

Regular verb: stare - stared - stared

Affirmation

Simple form	V-ing form
I could stare you could stare he could stare we could stare you could stare they could stare	I could be staring you could be staring he could be staring we could be staring you could be staring they could be staring
Perfect	V-ing perfect
I could have stared you could have stared he could have stared we could have stared you could have stared they could have stared	I could have been staring you could have been staring he could have been staring we could have been staring you could have been staring they could have been staring

Negation

Simple form	V-ing form
I couldn't stare you couldn't stare he couldn't stare we couldn't stare you couldn't stare they couldn't stare	I couldn't be staring you couldn't be staring he couldn't be staring we couldn't be staring you couldn't be staring they couldn't be staring
Perfect	V-ing perfect
I couldn't have stared you couldn't have stared he couldn't have stared we couldn't have stared you couldn't have stared they couldn't have stared	I couldn't have been staring you couldn't have been staring he couldn't have been staring we couldn't have been staring you couldn't have been staring they couldn't have been staring

Interrogative form

Simple form	V-ing form
could I stare? could you stare? could he stare? could we stare? could you stare? could they stare?	could I be staring? could you be staring? could he be staring? could we be staring? could you be staring? could they be staring?
Perfect	V-ing perfect
could I have stared? could you have stared? could he have stared? could we have stared? could you have stared? could they have stared?	could I have been staring? could you have been staring? could he have been staring? could we have been staring? could you have been staring? could they have been staring?

Interro-negative form

Simple form	V-ing form
couldn't I stare? couldn't you stare? couldn't he stare? couldn't we stare? couldn't you stare? couldn't they stare?	couldn't I be staring? couldn't you be staring? couldn't he be staring? couldn't we be staring? couldn't you be staring? couldn't they be staring?
Perfect	V-ing perfect
couldn't I have stared? couldn't you have stared? couldn't he have stared? couldn't we have stared? couldn't you have stared? couldn't they have stared?	couldn't I have been staring? couldn't you have been staring? couldn't he have been staring? couldn't we have been staring? couldn't you have been staring? couldn't they have been staring?