I can preadopt you can preadopt she can preadopt we can preadopt you can preadopt they can preadopt
V-ing form
I can be preadopting you can be preadopting she can be preadopting we can be preadopting you can be preadopting they can be preadopting
Perfect
I can have preadopted you can have preadopted she 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 she can have been preadopting we can have been preadopting you can have been preadopting they can have been preadopting
Negation
Simple form
I cannot preadopt you cannot preadopt she cannot preadopt we cannot preadopt you cannot preadopt they cannot preadopt
V-ing form
I cannot be preadopting you cannot be preadopting she cannot be preadopting we cannot be preadopting you cannot be preadopting they cannot be preadopting
Perfect
I cannot have preadopted you cannot have preadopted she cannot have preadopted we cannot have preadopted you cannot have preadopted they cannot have preadopted
V-ing perfect
I cannot have been preadopting you cannot have been preadopting she cannot have been preadopting we cannot have been preadopting you cannot have been preadopting they cannot have been preadopting
Interrogative form
Simple form
can I preadopt? can you preadopt? can she preadopt? can we preadopt? can you preadopt? can they preadopt?
V-ing form
can I be preadopting? can you be preadopting? can she be preadopting? can we be preadopting? can you be preadopting? can they be preadopting?
Perfect
can I have preadopted? can you have preadopted? can she 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 she have been preadopting? can we have been preadopting? can you have been preadopting? can they have been preadopting?
Interro-negative form
Simple form
can I not preadopt? can you not preadopt? can she not preadopt? can we not preadopt? can you not preadopt? can they not preadopt?
V-ing form
can I not be preadopting? can you not be preadopting? can she not be preadopting? can we not be preadopting? can you not be preadopting? can they not be preadopting?
Perfect
can I not have preadopted? can you not have preadopted? can she not have preadopted? can we not have preadopted? can you not have preadopted? can they not have preadopted?
V-ing perfect
can I not have been preadopting? can you not have been preadopting? can she not have been preadopting? can we not have been preadopting? can you not have been preadopting? can they not have been preadopting?