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 can't order you can't order he can't order we can't order you can't order they can't order	I can't be ordering you can't be ordering he can't be ordering we can't be ordering you can't be ordering they can't be ordering
Perfect	V-ing perfect
I can't have ordered you can't have ordered he can't have ordered we can't have ordered you can't have ordered they can't have ordered	I can't have been ordering you can't have been ordering he can't have been ordering we can't have been ordering you can't have been ordering they can't 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't I order? can't you order? can't he order? can't we order? can't you order? can't they order?	can't I be ordering? can't you be ordering? can't he be ordering? can't we be ordering? can't you be ordering? can't they be ordering?
Perfect	V-ing perfect
can't I have ordered? can't you have ordered? can't he have ordered? can't we have ordered? can't you have ordered? can't they have ordered?	can't I have been ordering? can't you have been ordering? can't he have been ordering? can't we have been ordering? can't you have been ordering? can't they have been ordering?