English verb conjugation
CAN ORDER

Regular verb: order - ordered - ordered

Affirmation

Simple form	V-ing form
I can order you can order he can order we can order you can order they can order	I can be ordering you can be ordering he can be ordering we can be ordering you can be ordering they can be ordering
Perfect	V-ing perfect
I can have ordered you can have ordered he can have ordered we can have ordered you can have ordered they can have ordered	I can have been ordering you can have been ordering he can have been ordering we can have been ordering you can have been ordering they can have been ordering

Negation

Simple form	V-ing form
I cannot order you cannot order he cannot order we cannot order you cannot order they cannot order	I cannot be ordering you cannot be ordering he cannot be ordering we cannot be ordering you cannot be ordering they cannot be ordering
Perfect	V-ing perfect
I cannot have ordered you cannot have ordered he cannot have ordered we cannot have ordered you cannot have ordered they cannot have ordered	I cannot have been ordering you cannot have been ordering he cannot have been ordering we cannot have been ordering you cannot have been ordering they cannot have been ordering

Interrogative form

Simple form	V-ing form
can I order? can you order? can he order? can we order? can you order? can they order?	can I be ordering? can you be ordering? can he be ordering? can we be ordering? can you be ordering? can they be ordering?
Perfect	V-ing perfect
can I have ordered? can you have ordered? can he have ordered? can we have ordered? can you have ordered? can they have ordered?	can I have been ordering? can you have been ordering? can he have been ordering? can we have been ordering? can you have been ordering? can they have been ordering?

Interro-negative form

Simple form	V-ing form
can I not order? can you not order? can he not order? can we not order? can you not order? can they not order?	can I not be ordering? can you not be ordering? can he not be ordering? can we not be ordering? can you not be ordering? can they not be ordering?
Perfect	V-ing perfect
can I not have ordered? can you not have ordered? can he not have ordered? can we not have ordered? can you not have ordered? can they not have ordered?	can I not have been ordering? can you not have been ordering? can he not have been ordering? can we not have been ordering? can you not have been ordering? can they not have been ordering?