I can ship you can ship she can ship we can ship you can ship they can ship
V-ing form
I can be shipping you can be shipping she can be shipping we can be shipping you can be shipping they can be shipping
Perfect
I can have shipped you can have shipped she can have shipped we can have shipped you can have shipped they can have shipped
V-ing perfect
I can have been shipping you can have been shipping she can have been shipping we can have been shipping you can have been shipping they can have been shipping
Negation
Simple form
I cannot ship you cannot ship she cannot ship we cannot ship you cannot ship they cannot ship
V-ing form
I cannot be shipping you cannot be shipping she cannot be shipping we cannot be shipping you cannot be shipping they cannot be shipping
Perfect
I cannot have shipped you cannot have shipped she cannot have shipped we cannot have shipped you cannot have shipped they cannot have shipped
V-ing perfect
I cannot have been shipping you cannot have been shipping she cannot have been shipping we cannot have been shipping you cannot have been shipping they cannot have been shipping
Interrogative form
Simple form
can I ship? can you ship? can she ship? can we ship? can you ship? can they ship?
V-ing form
can I be shipping? can you be shipping? can she be shipping? can we be shipping? can you be shipping? can they be shipping?
Perfect
can I have shipped? can you have shipped? can she have shipped? can we have shipped? can you have shipped? can they have shipped?
V-ing perfect
can I have been shipping? can you have been shipping? can she have been shipping? can we have been shipping? can you have been shipping? can they have been shipping?
Interro-negative form
Simple form
can I not ship? can you not ship? can she not ship? can we not ship? can you not ship? can they not ship?
V-ing form
can I not be shipping? can you not be shipping? can she not be shipping? can we not be shipping? can you not be shipping? can they not be shipping?
Perfect
can I not have shipped? can you not have shipped? can she not have shipped? can we not have shipped? can you not have shipped? can they not have shipped?
V-ing perfect
can I not have been shipping? can you not have been shipping? can she not have been shipping? can we not have been shipping? can you not have been shipping? can they not have been shipping?