I can celebrate you can celebrate he can celebrate we can celebrate you can celebrate they can celebrate
V-ing form
I can be celebrating you can be celebrating he can be celebrating we can be celebrating you can be celebrating they can be celebrating
Perfect
I can have celebrated you can have celebrated he can have celebrated we can have celebrated you can have celebrated they can have celebrated
V-ing perfect
I can have been celebrating you can have been celebrating he can have been celebrating we can have been celebrating you can have been celebrating they can have been celebrating
Negation
Simple form
I cannot celebrate you cannot celebrate he cannot celebrate we cannot celebrate you cannot celebrate they cannot celebrate
V-ing form
I cannot be celebrating you cannot be celebrating he cannot be celebrating we cannot be celebrating you cannot be celebrating they cannot be celebrating
Perfect
I cannot have celebrated you cannot have celebrated he cannot have celebrated we cannot have celebrated you cannot have celebrated they cannot have celebrated
V-ing perfect
I cannot have been celebrating you cannot have been celebrating he cannot have been celebrating we cannot have been celebrating you cannot have been celebrating they cannot have been celebrating
Interrogative form
Simple form
can I celebrate? can you celebrate? can he celebrate? can we celebrate? can you celebrate? can they celebrate?
V-ing form
can I be celebrating? can you be celebrating? can he be celebrating? can we be celebrating? can you be celebrating? can they be celebrating?
Perfect
can I have celebrated? can you have celebrated? can he have celebrated? can we have celebrated? can you have celebrated? can they have celebrated?
V-ing perfect
can I have been celebrating? can you have been celebrating? can he have been celebrating? can we have been celebrating? can you have been celebrating? can they have been celebrating?
Interro-negative form
Simple form
can I not celebrate? can you not celebrate? can he not celebrate? can we not celebrate? can you not celebrate? can they not celebrate?
V-ing form
can I not be celebrating? can you not be celebrating? can he not be celebrating? can we not be celebrating? can you not be celebrating? can they not be celebrating?
Perfect
can I not have celebrated? can you not have celebrated? can he not have celebrated? can we not have celebrated? can you not have celebrated? can they not have celebrated?
V-ing perfect
can I not have been celebrating? can you not have been celebrating? can he not have been celebrating? can we not have been celebrating? can you not have been celebrating? can they not have been celebrating?