I can purple you can purple she can purple we can purple you can purple they can purple
V-ing form
I can be purpling you can be purpling she can be purpling we can be purpling you can be purpling they can be purpling
Perfect
I can have purpled you can have purpled she can have purpled we can have purpled you can have purpled they can have purpled
V-ing perfect
I can have been purpling you can have been purpling she can have been purpling we can have been purpling you can have been purpling they can have been purpling
Negation
Simple form
I cannot purple you cannot purple she cannot purple we cannot purple you cannot purple they cannot purple
V-ing form
I cannot be purpling you cannot be purpling she cannot be purpling we cannot be purpling you cannot be purpling they cannot be purpling
Perfect
I cannot have purpled you cannot have purpled she cannot have purpled we cannot have purpled you cannot have purpled they cannot have purpled
V-ing perfect
I cannot have been purpling you cannot have been purpling she cannot have been purpling we cannot have been purpling you cannot have been purpling they cannot have been purpling
Interrogative form
Simple form
can I purple? can you purple? can she purple? can we purple? can you purple? can they purple?
V-ing form
can I be purpling? can you be purpling? can she be purpling? can we be purpling? can you be purpling? can they be purpling?
Perfect
can I have purpled? can you have purpled? can she have purpled? can we have purpled? can you have purpled? can they have purpled?
V-ing perfect
can I have been purpling? can you have been purpling? can she have been purpling? can we have been purpling? can you have been purpling? can they have been purpling?
Interro-negative form
Simple form
can I not purple? can you not purple? can she not purple? can we not purple? can you not purple? can they not purple?
V-ing form
can I not be purpling? can you not be purpling? can she not be purpling? can we not be purpling? can you not be purpling? can they not be purpling?
Perfect
can I not have purpled? can you not have purpled? can she not have purpled? can we not have purpled? can you not have purpled? can they not have purpled?
V-ing perfect
can I not have been purpling? can you not have been purpling? can she not have been purpling? can we not have been purpling? can you not have been purpling? can they not have been purpling?