I can chip you can chip he can chip we can chip you can chip they can chip
V-ing form
I can be chipping you can be chipping he can be chipping we can be chipping you can be chipping they can be chipping
Perfect
I can have chipped you can have chipped he can have chipped we can have chipped you can have chipped they can have chipped
V-ing perfect
I can have been chipping you can have been chipping he can have been chipping we can have been chipping you can have been chipping they can have been chipping
Negation
Simple form
I cannot chip you cannot chip he cannot chip we cannot chip you cannot chip they cannot chip
V-ing form
I cannot be chipping you cannot be chipping he cannot be chipping we cannot be chipping you cannot be chipping they cannot be chipping
Perfect
I cannot have chipped you cannot have chipped he cannot have chipped we cannot have chipped you cannot have chipped they cannot have chipped
V-ing perfect
I cannot have been chipping you cannot have been chipping he cannot have been chipping we cannot have been chipping you cannot have been chipping they cannot have been chipping
Interrogative form
Simple form
can I chip? can you chip? can he chip? can we chip? can you chip? can they chip?
V-ing form
can I be chipping? can you be chipping? can he be chipping? can we be chipping? can you be chipping? can they be chipping?
Perfect
can I have chipped? can you have chipped? can he have chipped? can we have chipped? can you have chipped? can they have chipped?
V-ing perfect
can I have been chipping? can you have been chipping? can he have been chipping? can we have been chipping? can you have been chipping? can they have been chipping?
Interro-negative form
Simple form
can I not chip? can you not chip? can he not chip? can we not chip? can you not chip? can they not chip?
V-ing form
can I not be chipping? can you not be chipping? can he not be chipping? can we not be chipping? can you not be chipping? can they not be chipping?
Perfect
can I not have chipped? can you not have chipped? can he not have chipped? can we not have chipped? can you not have chipped? can they not have chipped?
V-ing perfect
can I not have been chipping? can you not have been chipping? can he not have been chipping? can we not have been chipping? can you not have been chipping? can they not have been chipping?