English verb conjugation
COULD TOUR

Regular verb: tour - toured - toured

Affirmation

Simple form	V-ing form
I could tour you could tour she could tour we could tour you could tour they could tour	I could be touring you could be touring she 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 she 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 she 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 couldn't tour you couldn't tour she couldn't tour we couldn't tour you couldn't tour they couldn't tour	I couldn't be touring you couldn't be touring she couldn't be touring we couldn't be touring you couldn't be touring they couldn't be touring
Perfect	V-ing perfect
I couldn't have toured you couldn't have toured she couldn't have toured we couldn't have toured you couldn't have toured they couldn't have toured	I couldn't have been touring you couldn't have been touring she couldn't have been touring we couldn't have been touring you couldn't have been touring they couldn't have been touring

Interrogative form

Simple form	V-ing form
could I tour? could you tour? could she tour? could we tour? could you tour? could they tour?	could I be touring? could you be touring? could she 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 she 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 she 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
couldn't I tour? couldn't you tour? couldn't she tour? couldn't we tour? couldn't you tour? couldn't they tour?	couldn't I be touring? couldn't you be touring? couldn't she be touring? couldn't we be touring? couldn't you be touring? couldn't they be touring?
Perfect	V-ing perfect
couldn't I have toured? couldn't you have toured? couldn't she have toured? couldn't we have toured? couldn't you have toured? couldn't they have toured?	couldn't I have been touring? couldn't you have been touring? couldn't she have been touring? couldn't we have been touring? couldn't you have been touring? couldn't they have been touring?