I can boo-hoo you can boo-hoo she can boo-hoo we can boo-hoo you can boo-hoo they can boo-hoo
V-ing form
I can be boo-hooing you can be boo-hooing she can be boo-hooing we can be boo-hooing you can be boo-hooing they can be boo-hooing
Perfect
I can have boo-hooed you can have boo-hooed she can have boo-hooed we can have boo-hooed you can have boo-hooed they can have boo-hooed
V-ing perfect
I can have been boo-hooing you can have been boo-hooing she can have been boo-hooing we can have been boo-hooing you can have been boo-hooing they can have been boo-hooing
Negation
Simple form
I can't boo-hoo you can't boo-hoo she can't boo-hoo we can't boo-hoo you can't boo-hoo they can't boo-hoo
V-ing form
I can't be boo-hooing you can't be boo-hooing she can't be boo-hooing we can't be boo-hooing you can't be boo-hooing they can't be boo-hooing
Perfect
I can't have boo-hooed you can't have boo-hooed she can't have boo-hooed we can't have boo-hooed you can't have boo-hooed they can't have boo-hooed
V-ing perfect
I can't have been boo-hooing you can't have been boo-hooing she can't have been boo-hooing we can't have been boo-hooing you can't have been boo-hooing they can't have been boo-hooing
Interrogative form
Simple form
can I boo-hoo? can you boo-hoo? can she boo-hoo? can we boo-hoo? can you boo-hoo? can they boo-hoo?
V-ing form
can I be boo-hooing? can you be boo-hooing? can she be boo-hooing? can we be boo-hooing? can you be boo-hooing? can they be boo-hooing?
Perfect
can I have boo-hooed? can you have boo-hooed? can she have boo-hooed? can we have boo-hooed? can you have boo-hooed? can they have boo-hooed?
V-ing perfect
can I have been boo-hooing? can you have been boo-hooing? can she have been boo-hooing? can we have been boo-hooing? can you have been boo-hooing? can they have been boo-hooing?
Interro-negative form
Simple form
can't I boo-hoo? can't you boo-hoo? can't she boo-hoo? can't we boo-hoo? can't you boo-hoo? can't they boo-hoo?
V-ing form
can't I be boo-hooing? can't you be boo-hooing? can't she be boo-hooing? can't we be boo-hooing? can't you be boo-hooing? can't they be boo-hooing?
Perfect
can't I have boo-hooed? can't you have boo-hooed? can't she have boo-hooed? can't we have boo-hooed? can't you have boo-hooed? can't they have boo-hooed?
V-ing perfect
can't I have been boo-hooing? can't you have been boo-hooing? can't she have been boo-hooing? can't we have been boo-hooing? can't you have been boo-hooing? can't they have been boo-hooing?