English verb conjugation
COULD THUNK

Regular verb: thunk - thunked - thunked

Affirmation

Simple form	V-ing form
I could thunk you could thunk she could thunk we could thunk you could thunk they could thunk	I could be thunking you could be thunking she could be thunking we could be thunking you could be thunking they could be thunking
Perfect	V-ing perfect
I could have thunked you could have thunked she could have thunked we could have thunked you could have thunked they could have thunked	I could have been thunking you could have been thunking she could have been thunking we could have been thunking you could have been thunking they could have been thunking

Negation

Simple form	V-ing form
I could not thunk you could not thunk she could not thunk we could not thunk you could not thunk they could not thunk	I could not be thunking you could not be thunking she could not be thunking we could not be thunking you could not be thunking they could not be thunking
Perfect	V-ing perfect
I could not have thunked you could not have thunked she could not have thunked we could not have thunked you could not have thunked they could not have thunked	I could not have been thunking you could not have been thunking she could not have been thunking we could not have been thunking you could not have been thunking they could not have been thunking

Interrogative form

Simple form	V-ing form
could I thunk? could you thunk? could she thunk? could we thunk? could you thunk? could they thunk?	could I be thunking? could you be thunking? could she be thunking? could we be thunking? could you be thunking? could they be thunking?
Perfect	V-ing perfect
could I have thunked? could you have thunked? could she have thunked? could we have thunked? could you have thunked? could they have thunked?	could I have been thunking? could you have been thunking? could she have been thunking? could we have been thunking? could you have been thunking? could they have been thunking?

Interro-negative form

Simple form	V-ing form
could I not thunk? could you not thunk? could she not thunk? could we not thunk? could you not thunk? could they not thunk?	could I not be thunking? could you not be thunking? could she not be thunking? could we not be thunking? could you not be thunking? could they not be thunking?
Perfect	V-ing perfect
could I not have thunked? could you not have thunked? could she not have thunked? could we not have thunked? could you not have thunked? could they not have thunked?	could I not have been thunking? could you not have been thunking? could she not have been thunking? could we not have been thunking? could you not have been thunking? could they not have been thunking?