English verb conjugation
COULD PINNACLE

Regular verb: pinnacle - pinnacled - pinnacled

Affirmation

Simple form	V-ing form
I could pinnacle you could pinnacle she could pinnacle we could pinnacle you could pinnacle they could pinnacle	I could be pinnacling you could be pinnacling she could be pinnacling we could be pinnacling you could be pinnacling they could be pinnacling
Perfect	V-ing perfect
I could have pinnacled you could have pinnacled she could have pinnacled we could have pinnacled you could have pinnacled they could have pinnacled	I could have been pinnacling you could have been pinnacling she could have been pinnacling we could have been pinnacling you could have been pinnacling they could have been pinnacling

Negation

Simple form	V-ing form
I could not pinnacle you could not pinnacle she could not pinnacle we could not pinnacle you could not pinnacle they could not pinnacle	I could not be pinnacling you could not be pinnacling she could not be pinnacling we could not be pinnacling you could not be pinnacling they could not be pinnacling
Perfect	V-ing perfect
I could not have pinnacled you could not have pinnacled she could not have pinnacled we could not have pinnacled you could not have pinnacled they could not have pinnacled	I could not have been pinnacling you could not have been pinnacling she could not have been pinnacling we could not have been pinnacling you could not have been pinnacling they could not have been pinnacling

Interrogative form

Simple form	V-ing form
could I pinnacle? could you pinnacle? could she pinnacle? could we pinnacle? could you pinnacle? could they pinnacle?	could I be pinnacling? could you be pinnacling? could she be pinnacling? could we be pinnacling? could you be pinnacling? could they be pinnacling?
Perfect	V-ing perfect
could I have pinnacled? could you have pinnacled? could she have pinnacled? could we have pinnacled? could you have pinnacled? could they have pinnacled?	could I have been pinnacling? could you have been pinnacling? could she have been pinnacling? could we have been pinnacling? could you have been pinnacling? could they have been pinnacling?

Interro-negative form

Simple form	V-ing form
could I not pinnacle? could you not pinnacle? could she not pinnacle? could we not pinnacle? could you not pinnacle? could they not pinnacle?	could I not be pinnacling? could you not be pinnacling? could she not be pinnacling? could we not be pinnacling? could you not be pinnacling? could they not be pinnacling?
Perfect	V-ing perfect
could I not have pinnacled? could you not have pinnacled? could she not have pinnacled? could we not have pinnacled? could you not have pinnacled? could they not have pinnacled?	could I not have been pinnacling? could you not have been pinnacling? could she not have been pinnacling? could we not have been pinnacling? could you not have been pinnacling? could they not have been pinnacling?