English verb conjugation
CAN GRAPH

Regular verb: graph - graphed - graphed

Affirmation

Simple form	V-ing form
I can graph you can graph he can graph we can graph you can graph they can graph	I can be graphing you can be graphing he can be graphing we can be graphing you can be graphing they can be graphing
Perfect	V-ing perfect
I can have graphed you can have graphed he can have graphed we can have graphed you can have graphed they can have graphed	I can have been graphing you can have been graphing he can have been graphing we can have been graphing you can have been graphing they can have been graphing

Negation

Simple form	V-ing form
I can't graph you can't graph he can't graph we can't graph you can't graph they can't graph	I can't be graphing you can't be graphing he can't be graphing we can't be graphing you can't be graphing they can't be graphing
Perfect	V-ing perfect
I can't have graphed you can't have graphed he can't have graphed we can't have graphed you can't have graphed they can't have graphed	I can't have been graphing you can't have been graphing he can't have been graphing we can't have been graphing you can't have been graphing they can't have been graphing

Interrogative form

Simple form	V-ing form
can I graph? can you graph? can he graph? can we graph? can you graph? can they graph?	can I be graphing? can you be graphing? can he be graphing? can we be graphing? can you be graphing? can they be graphing?
Perfect	V-ing perfect
can I have graphed? can you have graphed? can he have graphed? can we have graphed? can you have graphed? can they have graphed?	can I have been graphing? can you have been graphing? can he have been graphing? can we have been graphing? can you have been graphing? can they have been graphing?

Interro-negative form

Simple form	V-ing form
can't I graph? can't you graph? can't he graph? can't we graph? can't you graph? can't they graph?	can't I be graphing? can't you be graphing? can't he be graphing? can't we be graphing? can't you be graphing? can't they be graphing?
Perfect	V-ing perfect
can't I have graphed? can't you have graphed? can't he have graphed? can't we have graphed? can't you have graphed? can't they have graphed?	can't I have been graphing? can't you have been graphing? can't he have been graphing? can't we have been graphing? can't you have been graphing? can't they have been graphing?