I can discontinue you can discontinue he can discontinue we can discontinue you can discontinue they can discontinue
V-ing form
I can be discontinuing you can be discontinuing he can be discontinuing we can be discontinuing you can be discontinuing they can be discontinuing
Perfect
I can have discontinued you can have discontinued he can have discontinued we can have discontinued you can have discontinued they can have discontinued
V-ing perfect
I can have been discontinuing you can have been discontinuing he can have been discontinuing we can have been discontinuing you can have been discontinuing they can have been discontinuing
Negation
Simple form
I can't discontinue you can't discontinue he can't discontinue we can't discontinue you can't discontinue they can't discontinue
V-ing form
I can't be discontinuing you can't be discontinuing he can't be discontinuing we can't be discontinuing you can't be discontinuing they can't be discontinuing
Perfect
I can't have discontinued you can't have discontinued he can't have discontinued we can't have discontinued you can't have discontinued they can't have discontinued
V-ing perfect
I can't have been discontinuing you can't have been discontinuing he can't have been discontinuing we can't have been discontinuing you can't have been discontinuing they can't have been discontinuing
Interrogative form
Simple form
can I discontinue? can you discontinue? can he discontinue? can we discontinue? can you discontinue? can they discontinue?
V-ing form
can I be discontinuing? can you be discontinuing? can he be discontinuing? can we be discontinuing? can you be discontinuing? can they be discontinuing?
Perfect
can I have discontinued? can you have discontinued? can he have discontinued? can we have discontinued? can you have discontinued? can they have discontinued?
V-ing perfect
can I have been discontinuing? can you have been discontinuing? can he have been discontinuing? can we have been discontinuing? can you have been discontinuing? can they have been discontinuing?
Interro-negative form
Simple form
can't I discontinue? can't you discontinue? can't he discontinue? can't we discontinue? can't you discontinue? can't they discontinue?
V-ing form
can't I be discontinuing? can't you be discontinuing? can't he be discontinuing? can't we be discontinuing? can't you be discontinuing? can't they be discontinuing?
Perfect
can't I have discontinued? can't you have discontinued? can't he have discontinued? can't we have discontinued? can't you have discontinued? can't they have discontinued?
V-ing perfect
can't I have been discontinuing? can't you have been discontinuing? can't he have been discontinuing? can't we have been discontinuing? can't you have been discontinuing? can't they have been discontinuing?