I can preadopt you can preadopt he can preadopt we can preadopt you can preadopt they can preadopt
V-ing form
I can be preadopting you can be preadopting he can be preadopting we can be preadopting you can be preadopting they can be preadopting
Perfect
I can have preadopted you can have preadopted he can have preadopted we can have preadopted you can have preadopted they can have preadopted
V-ing perfect
I can have been preadopting you can have been preadopting he can have been preadopting we can have been preadopting you can have been preadopting they can have been preadopting
Negation
Simple form
I can't preadopt you can't preadopt he can't preadopt we can't preadopt you can't preadopt they can't preadopt
V-ing form
I can't be preadopting you can't be preadopting he can't be preadopting we can't be preadopting you can't be preadopting they can't be preadopting
Perfect
I can't have preadopted you can't have preadopted he can't have preadopted we can't have preadopted you can't have preadopted they can't have preadopted
V-ing perfect
I can't have been preadopting you can't have been preadopting he can't have been preadopting we can't have been preadopting you can't have been preadopting they can't have been preadopting
Interrogative form
Simple form
can I preadopt? can you preadopt? can he preadopt? can we preadopt? can you preadopt? can they preadopt?
V-ing form
can I be preadopting? can you be preadopting? can he be preadopting? can we be preadopting? can you be preadopting? can they be preadopting?
Perfect
can I have preadopted? can you have preadopted? can he have preadopted? can we have preadopted? can you have preadopted? can they have preadopted?
V-ing perfect
can I have been preadopting? can you have been preadopting? can he have been preadopting? can we have been preadopting? can you have been preadopting? can they have been preadopting?
Interro-negative form
Simple form
can't I preadopt? can't you preadopt? can't he preadopt? can't we preadopt? can't you preadopt? can't they preadopt?
V-ing form
can't I be preadopting? can't you be preadopting? can't he be preadopting? can't we be preadopting? can't you be preadopting? can't they be preadopting?
Perfect
can't I have preadopted? can't you have preadopted? can't he have preadopted? can't we have preadopted? can't you have preadopted? can't they have preadopted?
V-ing perfect
can't I have been preadopting? can't you have been preadopting? can't he have been preadopting? can't we have been preadopting? can't you have been preadopting? can't they have been preadopting?