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 couldn't think think you couldn't think think he couldn't think think we couldn't think think you couldn't think think they couldn't think think	I couldn't be think thinking you couldn't be think thinking he couldn't be think thinking we couldn't be think thinking you couldn't be think thinking they couldn't be think thinking
Perfect	V-ing perfect
I couldn't have think thinked you couldn't have think thinked he couldn't have think thinked we couldn't have think thinked you couldn't have think thinked they couldn't have think thinked	I couldn't have been think thinking you couldn't have been think thinking he couldn't have been think thinking we couldn't have been think thinking you couldn't have been think thinking they couldn't 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
couldn't I think think? couldn't you think think? couldn't he think think? couldn't we think think? couldn't you think think? couldn't they think think?	couldn't I be think thinking? couldn't you be think thinking? couldn't he be think thinking? couldn't we be think thinking? couldn't you be think thinking? couldn't they be think thinking?
Perfect	V-ing perfect
couldn't I have think thinked? couldn't you have think thinked? couldn't he have think thinked? couldn't we have think thinked? couldn't you have think thinked? couldn't they have think thinked?	couldn't I have been think thinking? couldn't you have been think thinking? couldn't he have been think thinking? couldn't we have been think thinking? couldn't you have been think thinking? couldn't they have been think thinking?