English verb conjugation
COULD CONJECTURE

Regular verb: conjecture - conjectured - conjectured

Affirmation

Simple form	V-ing form
I could conjecture you could conjecture she could conjecture we could conjecture you could conjecture they could conjecture	I could be conjecturing you could be conjecturing she could be conjecturing we could be conjecturing you could be conjecturing they could be conjecturing
Perfect	V-ing perfect
I could have conjectured you could have conjectured she could have conjectured we could have conjectured you could have conjectured they could have conjectured	I could have been conjecturing you could have been conjecturing she could have been conjecturing we could have been conjecturing you could have been conjecturing they could have been conjecturing

Negation

Simple form	V-ing form
I couldn't conjecture you couldn't conjecture she couldn't conjecture we couldn't conjecture you couldn't conjecture they couldn't conjecture	I couldn't be conjecturing you couldn't be conjecturing she couldn't be conjecturing we couldn't be conjecturing you couldn't be conjecturing they couldn't be conjecturing
Perfect	V-ing perfect
I couldn't have conjectured you couldn't have conjectured she couldn't have conjectured we couldn't have conjectured you couldn't have conjectured they couldn't have conjectured	I couldn't have been conjecturing you couldn't have been conjecturing she couldn't have been conjecturing we couldn't have been conjecturing you couldn't have been conjecturing they couldn't have been conjecturing

Interrogative form

Simple form	V-ing form
could I conjecture? could you conjecture? could she conjecture? could we conjecture? could you conjecture? could they conjecture?	could I be conjecturing? could you be conjecturing? could she be conjecturing? could we be conjecturing? could you be conjecturing? could they be conjecturing?
Perfect	V-ing perfect
could I have conjectured? could you have conjectured? could she have conjectured? could we have conjectured? could you have conjectured? could they have conjectured?	could I have been conjecturing? could you have been conjecturing? could she have been conjecturing? could we have been conjecturing? could you have been conjecturing? could they have been conjecturing?

Interro-negative form

Simple form	V-ing form
couldn't I conjecture? couldn't you conjecture? couldn't she conjecture? couldn't we conjecture? couldn't you conjecture? couldn't they conjecture?	couldn't I be conjecturing? couldn't you be conjecturing? couldn't she be conjecturing? couldn't we be conjecturing? couldn't you be conjecturing? couldn't they be conjecturing?
Perfect	V-ing perfect
couldn't I have conjectured? couldn't you have conjectured? couldn't she have conjectured? couldn't we have conjectured? couldn't you have conjectured? couldn't they have conjectured?	couldn't I have been conjecturing? couldn't you have been conjecturing? couldn't she have been conjecturing? couldn't we have been conjecturing? couldn't you have been conjecturing? couldn't they have been conjecturing?