English verb conjugation
CAN CONTOUR

Regular verb: contour - contoured - contoured

Affirmation

Simple form	V-ing form
I can contour you can contour he can contour we can contour you can contour they can contour	I can be contouring you can be contouring he can be contouring we can be contouring you can be contouring they can be contouring
Perfect	V-ing perfect
I can have contoured you can have contoured he can have contoured we can have contoured you can have contoured they can have contoured	I can have been contouring you can have been contouring he can have been contouring we can have been contouring you can have been contouring they can have been contouring

Negation

Simple form	V-ing form
I can't contour you can't contour he can't contour we can't contour you can't contour they can't contour	I can't be contouring you can't be contouring he can't be contouring we can't be contouring you can't be contouring they can't be contouring
Perfect	V-ing perfect
I can't have contoured you can't have contoured he can't have contoured we can't have contoured you can't have contoured they can't have contoured	I can't have been contouring you can't have been contouring he can't have been contouring we can't have been contouring you can't have been contouring they can't have been contouring

Interrogative form

Simple form	V-ing form
can I contour? can you contour? can he contour? can we contour? can you contour? can they contour?	can I be contouring? can you be contouring? can he be contouring? can we be contouring? can you be contouring? can they be contouring?
Perfect	V-ing perfect
can I have contoured? can you have contoured? can he have contoured? can we have contoured? can you have contoured? can they have contoured?	can I have been contouring? can you have been contouring? can he have been contouring? can we have been contouring? can you have been contouring? can they have been contouring?

Interro-negative form

Simple form	V-ing form
can't I contour? can't you contour? can't he contour? can't we contour? can't you contour? can't they contour?	can't I be contouring? can't you be contouring? can't he be contouring? can't we be contouring? can't you be contouring? can't they be contouring?
Perfect	V-ing perfect
can't I have contoured? can't you have contoured? can't he have contoured? can't we have contoured? can't you have contoured? can't they have contoured?	can't I have been contouring? can't you have been contouring? can't he have been contouring? can't we have been contouring? can't you have been contouring? can't they have been contouring?