I can boo you can boo he can boo we can boo you can boo they can boo
V-ing form
I can be booing you can be booing he can be booing we can be booing you can be booing they can be booing
Perfect
I can have booed you can have booed he can have booed we can have booed you can have booed they can have booed
V-ing perfect
I can have been booing you can have been booing he can have been booing we can have been booing you can have been booing they can have been booing
Negation
Simple form
I can't boo you can't boo he can't boo we can't boo you can't boo they can't boo
V-ing form
I can't be booing you can't be booing he can't be booing we can't be booing you can't be booing they can't be booing
Perfect
I can't have booed you can't have booed he can't have booed we can't have booed you can't have booed they can't have booed
V-ing perfect
I can't have been booing you can't have been booing he can't have been booing we can't have been booing you can't have been booing they can't have been booing
Interrogative form
Simple form
can I boo? can you boo? can he boo? can we boo? can you boo? can they boo?
V-ing form
can I be booing? can you be booing? can he be booing? can we be booing? can you be booing? can they be booing?
Perfect
can I have booed? can you have booed? can he have booed? can we have booed? can you have booed? can they have booed?
V-ing perfect
can I have been booing? can you have been booing? can he have been booing? can we have been booing? can you have been booing? can they have been booing?
Interro-negative form
Simple form
can't I boo? can't you boo? can't he boo? can't we boo? can't you boo? can't they boo?
V-ing form
can't I be booing? can't you be booing? can't he be booing? can't we be booing? can't you be booing? can't they be booing?
Perfect
can't I have booed? can't you have booed? can't he have booed? can't we have booed? can't you have booed? can't they have booed?
V-ing perfect
can't I have been booing? can't you have been booing? can't he have been booing? can't we have been booing? can't you have been booing? can't they have been booing?