I can bobbie you can bobbie he can bobbie we can bobbie you can bobbie they can bobbie
V-ing form
I can be bobbying you can be bobbying he can be bobbying we can be bobbying you can be bobbying they can be bobbying
Perfect
I can have bobbied you can have bobbied he can have bobbied we can have bobbied you can have bobbied they can have bobbied
V-ing perfect
I can have been bobbying you can have been bobbying he can have been bobbying we can have been bobbying you can have been bobbying they can have been bobbying
Negation
Simple form
I cannot bobbie you cannot bobbie he cannot bobbie we cannot bobbie you cannot bobbie they cannot bobbie
V-ing form
I cannot be bobbying you cannot be bobbying he cannot be bobbying we cannot be bobbying you cannot be bobbying they cannot be bobbying
Perfect
I cannot have bobbied you cannot have bobbied he cannot have bobbied we cannot have bobbied you cannot have bobbied they cannot have bobbied
V-ing perfect
I cannot have been bobbying you cannot have been bobbying he cannot have been bobbying we cannot have been bobbying you cannot have been bobbying they cannot have been bobbying
Interrogative form
Simple form
can I bobbie? can you bobbie? can he bobbie? can we bobbie? can you bobbie? can they bobbie?
V-ing form
can I be bobbying? can you be bobbying? can he be bobbying? can we be bobbying? can you be bobbying? can they be bobbying?
Perfect
can I have bobbied? can you have bobbied? can he have bobbied? can we have bobbied? can you have bobbied? can they have bobbied?
V-ing perfect
can I have been bobbying? can you have been bobbying? can he have been bobbying? can we have been bobbying? can you have been bobbying? can they have been bobbying?
Interro-negative form
Simple form
can I not bobbie? can you not bobbie? can he not bobbie? can we not bobbie? can you not bobbie? can they not bobbie?
V-ing form
can I not be bobbying? can you not be bobbying? can he not be bobbying? can we not be bobbying? can you not be bobbying? can they not be bobbying?
Perfect
can I not have bobbied? can you not have bobbied? can he not have bobbied? can we not have bobbied? can you not have bobbied? can they not have bobbied?
V-ing perfect
can I not have been bobbying? can you not have been bobbying? can he not have been bobbying? can we not have been bobbying? can you not have been bobbying? can they not have been bobbying?