English verb conjugation
CAN SIED

Regular verb: sied - sieded - sieded

Affirmation

Simple form	V-ing form
I can sied you can sied she can sied we can sied you can sied they can sied	I can be sieding you can be sieding she can be sieding we can be sieding you can be sieding they can be sieding
Perfect	V-ing perfect
I can have sieded you can have sieded she can have sieded we can have sieded you can have sieded they can have sieded	I can have been sieding you can have been sieding she can have been sieding we can have been sieding you can have been sieding they can have been sieding

Negation

Simple form	V-ing form
I cannot sied you cannot sied she cannot sied we cannot sied you cannot sied they cannot sied	I cannot be sieding you cannot be sieding she cannot be sieding we cannot be sieding you cannot be sieding they cannot be sieding
Perfect	V-ing perfect
I cannot have sieded you cannot have sieded she cannot have sieded we cannot have sieded you cannot have sieded they cannot have sieded	I cannot have been sieding you cannot have been sieding she cannot have been sieding we cannot have been sieding you cannot have been sieding they cannot have been sieding

Interrogative form

Simple form	V-ing form
can I sied? can you sied? can she sied? can we sied? can you sied? can they sied?	can I be sieding? can you be sieding? can she be sieding? can we be sieding? can you be sieding? can they be sieding?
Perfect	V-ing perfect
can I have sieded? can you have sieded? can she have sieded? can we have sieded? can you have sieded? can they have sieded?	can I have been sieding? can you have been sieding? can she have been sieding? can we have been sieding? can you have been sieding? can they have been sieding?

Interro-negative form

Simple form	V-ing form
can I not sied? can you not sied? can she not sied? can we not sied? can you not sied? can they not sied?	can I not be sieding? can you not be sieding? can she not be sieding? can we not be sieding? can you not be sieding? can they not be sieding?
Perfect	V-ing perfect
can I not have sieded? can you not have sieded? can she not have sieded? can we not have sieded? can you not have sieded? can they not have sieded?	can I not have been sieding? can you not have been sieding? can she not have been sieding? can we not have been sieding? can you not have been sieding? can they not have been sieding?