English verb conjugation
COULD REASON

Regular verb: reason - reasoned - reasoned

Affirmation

Simple form	V-ing form
I could reason you could reason he could reason we could reason you could reason they could reason	I could be reasoning you could be reasoning he could be reasoning we could be reasoning you could be reasoning they could be reasoning
Perfect	V-ing perfect
I could have reasoned you could have reasoned he could have reasoned we could have reasoned you could have reasoned they could have reasoned	I could have been reasoning you could have been reasoning he could have been reasoning we could have been reasoning you could have been reasoning they could have been reasoning

Negation

Simple form	V-ing form
I couldn't reason you couldn't reason he couldn't reason we couldn't reason you couldn't reason they couldn't reason	I couldn't be reasoning you couldn't be reasoning he couldn't be reasoning we couldn't be reasoning you couldn't be reasoning they couldn't be reasoning
Perfect	V-ing perfect
I couldn't have reasoned you couldn't have reasoned he couldn't have reasoned we couldn't have reasoned you couldn't have reasoned they couldn't have reasoned	I couldn't have been reasoning you couldn't have been reasoning he couldn't have been reasoning we couldn't have been reasoning you couldn't have been reasoning they couldn't have been reasoning

Interrogative form

Simple form	V-ing form
could I reason? could you reason? could he reason? could we reason? could you reason? could they reason?	could I be reasoning? could you be reasoning? could he be reasoning? could we be reasoning? could you be reasoning? could they be reasoning?
Perfect	V-ing perfect
could I have reasoned? could you have reasoned? could he have reasoned? could we have reasoned? could you have reasoned? could they have reasoned?	could I have been reasoning? could you have been reasoning? could he have been reasoning? could we have been reasoning? could you have been reasoning? could they have been reasoning?

Interro-negative form

Simple form	V-ing form
couldn't I reason? couldn't you reason? couldn't he reason? couldn't we reason? couldn't you reason? couldn't they reason?	couldn't I be reasoning? couldn't you be reasoning? couldn't he be reasoning? couldn't we be reasoning? couldn't you be reasoning? couldn't they be reasoning?
Perfect	V-ing perfect
couldn't I have reasoned? couldn't you have reasoned? couldn't he have reasoned? couldn't we have reasoned? couldn't you have reasoned? couldn't they have reasoned?	couldn't I have been reasoning? couldn't you have been reasoning? couldn't he have been reasoning? couldn't we have been reasoning? couldn't you have been reasoning? couldn't they have been reasoning?