I can prerequire you can prerequire he can prerequire we can prerequire you can prerequire they can prerequire
V-ing form
I can be prerequiring you can be prerequiring he can be prerequiring we can be prerequiring you can be prerequiring they can be prerequiring
Perfect
I can have prerequired you can have prerequired he can have prerequired we can have prerequired you can have prerequired they can have prerequired
V-ing perfect
I can have been prerequiring you can have been prerequiring he can have been prerequiring we can have been prerequiring you can have been prerequiring they can have been prerequiring
Negation
Simple form
I cannot prerequire you cannot prerequire he cannot prerequire we cannot prerequire you cannot prerequire they cannot prerequire
V-ing form
I cannot be prerequiring you cannot be prerequiring he cannot be prerequiring we cannot be prerequiring you cannot be prerequiring they cannot be prerequiring
Perfect
I cannot have prerequired you cannot have prerequired he cannot have prerequired we cannot have prerequired you cannot have prerequired they cannot have prerequired
V-ing perfect
I cannot have been prerequiring you cannot have been prerequiring he cannot have been prerequiring we cannot have been prerequiring you cannot have been prerequiring they cannot have been prerequiring
Interrogative form
Simple form
can I prerequire? can you prerequire? can he prerequire? can we prerequire? can you prerequire? can they prerequire?
V-ing form
can I be prerequiring? can you be prerequiring? can he be prerequiring? can we be prerequiring? can you be prerequiring? can they be prerequiring?
Perfect
can I have prerequired? can you have prerequired? can he have prerequired? can we have prerequired? can you have prerequired? can they have prerequired?
V-ing perfect
can I have been prerequiring? can you have been prerequiring? can he have been prerequiring? can we have been prerequiring? can you have been prerequiring? can they have been prerequiring?
Interro-negative form
Simple form
can I not prerequire? can you not prerequire? can he not prerequire? can we not prerequire? can you not prerequire? can they not prerequire?
V-ing form
can I not be prerequiring? can you not be prerequiring? can he not be prerequiring? can we not be prerequiring? can you not be prerequiring? can they not be prerequiring?
Perfect
can I not have prerequired? can you not have prerequired? can he not have prerequired? can we not have prerequired? can you not have prerequired? can they not have prerequired?
V-ing perfect
can I not have been prerequiring? can you not have been prerequiring? can he not have been prerequiring? can we not have been prerequiring? can you not have been prerequiring? can they not have been prerequiring?