English verb conjugation
COULD TOUR

Regular verb: tour - toured - toured

Affirmation

Simple form	V-ing form
I could tour you could tour he could tour we could tour you could tour they could tour	I could be touring you could be touring he could be touring we could be touring you could be touring they could be touring
Perfect	V-ing perfect
I could have toured you could have toured he could have toured we could have toured you could have toured they could have toured	I could have been touring you could have been touring he could have been touring we could have been touring you could have been touring they could have been touring

Negation

Simple form	V-ing form
I could not tour you could not tour he could not tour we could not tour you could not tour they could not tour	I could not be touring you could not be touring he could not be touring we could not be touring you could not be touring they could not be touring
Perfect	V-ing perfect
I could not have toured you could not have toured he could not have toured we could not have toured you could not have toured they could not have toured	I could not have been touring you could not have been touring he could not have been touring we could not have been touring you could not have been touring they could not have been touring

Interrogative form

Simple form	V-ing form
could I tour? could you tour? could he tour? could we tour? could you tour? could they tour?	could I be touring? could you be touring? could he be touring? could we be touring? could you be touring? could they be touring?
Perfect	V-ing perfect
could I have toured? could you have toured? could he have toured? could we have toured? could you have toured? could they have toured?	could I have been touring? could you have been touring? could he have been touring? could we have been touring? could you have been touring? could they have been touring?

Interro-negative form

Simple form	V-ing form
could I not tour? could you not tour? could he not tour? could we not tour? could you not tour? could they not tour?	could I not be touring? could you not be touring? could he not be touring? could we not be touring? could you not be touring? could they not be touring?
Perfect	V-ing perfect
could I not have toured? could you not have toured? could he not have toured? could we not have toured? could you not have toured? could they not have toured?	could I not have been touring? could you not have been touring? could he not have been touring? could we not have been touring? could you not have been touring? could they not have been touring?