English verb conjugation
CAN SUBSERVE

Regular verb: subserve - subserved - subserved

Affirmation

Simple form	V-ing form
I can subserve you can subserve she can subserve we can subserve you can subserve they can subserve	I can be subserving you can be subserving she can be subserving we can be subserving you can be subserving they can be subserving
Perfect	V-ing perfect
I can have subserved you can have subserved she can have subserved we can have subserved you can have subserved they can have subserved	I can have been subserving you can have been subserving she can have been subserving we can have been subserving you can have been subserving they can have been subserving

Negation

Simple form	V-ing form
I can't subserve you can't subserve she can't subserve we can't subserve you can't subserve they can't subserve	I can't be subserving you can't be subserving she can't be subserving we can't be subserving you can't be subserving they can't be subserving
Perfect	V-ing perfect
I can't have subserved you can't have subserved she can't have subserved we can't have subserved you can't have subserved they can't have subserved	I can't have been subserving you can't have been subserving she can't have been subserving we can't have been subserving you can't have been subserving they can't have been subserving

Interrogative form

Simple form	V-ing form
can I subserve? can you subserve? can she subserve? can we subserve? can you subserve? can they subserve?	can I be subserving? can you be subserving? can she be subserving? can we be subserving? can you be subserving? can they be subserving?
Perfect	V-ing perfect
can I have subserved? can you have subserved? can she have subserved? can we have subserved? can you have subserved? can they have subserved?	can I have been subserving? can you have been subserving? can she have been subserving? can we have been subserving? can you have been subserving? can they have been subserving?

Interro-negative form

Simple form	V-ing form
can't I subserve? can't you subserve? can't she subserve? can't we subserve? can't you subserve? can't they subserve?	can't I be subserving? can't you be subserving? can't she be subserving? can't we be subserving? can't you be subserving? can't they be subserving?
Perfect	V-ing perfect
can't I have subserved? can't you have subserved? can't she have subserved? can't we have subserved? can't you have subserved? can't they have subserved?	can't I have been subserving? can't you have been subserving? can't she have been subserving? can't we have been subserving? can't you have been subserving? can't they have been subserving?