English verb conjugation
COULD THINK THINK

Regular verb: think think - think thinked - think thinked

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could think think you could think think he could think think we could think think you could think think they could think think	I could be think thinking you could be think thinking he could be think thinking we could be think thinking you could be think thinking they could be think thinking
Perfect	V-ing perfect
I could have think thinked you could have think thinked he could have think thinked we could have think thinked you could have think thinked they could have think thinked	I could have been think thinking you could have been think thinking he could have been think thinking we could have been think thinking you could have been think thinking they could have been think thinking

Negation

Simple form	V-ing form
I could not think think you could not think think he could not think think we could not think think you could not think think they could not think think	I could not be think thinking you could not be think thinking he could not be think thinking we could not be think thinking you could not be think thinking they could not be think thinking
Perfect	V-ing perfect
I could not have think thinked you could not have think thinked he could not have think thinked we could not have think thinked you could not have think thinked they could not have think thinked	I could not have been think thinking you could not have been think thinking he could not have been think thinking we could not have been think thinking you could not have been think thinking they could not have been think thinking

Interrogative form

Simple form	V-ing form
could I think think? could you think think? could he think think? could we think think? could you think think? could they think think?	could I be think thinking? could you be think thinking? could he be think thinking? could we be think thinking? could you be think thinking? could they be think thinking?
Perfect	V-ing perfect
could I have think thinked? could you have think thinked? could he have think thinked? could we have think thinked? could you have think thinked? could they have think thinked?	could I have been think thinking? could you have been think thinking? could he have been think thinking? could we have been think thinking? could you have been think thinking? could they have been think thinking?

Interro-negative form

Simple form	V-ing form
could I not think think? could you not think think? could he not think think? could we not think think? could you not think think? could they not think think?	could I not be think thinking? could you not be think thinking? could he not be think thinking? could we not be think thinking? could you not be think thinking? could they not be think thinking?
Perfect	V-ing perfect
could I not have think thinked? could you not have think thinked? could he not have think thinked? could we not have think thinked? could you not have think thinked? could they not have think thinked?	could I not have been think thinking? could you not have been think thinking? could he not have been think thinking? could we not have been think thinking? could you not have been think thinking? could they not have been think thinking?