English verb conjugation
CAN SIED

Regular verb: sied - sieded - sieded

Affirmation

Simple form	V-ing form
I can sied you can sied he can sied we can sied you can sied they can sied	I can be sieding you can be sieding he 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 he 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 he 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 he cannot sied we cannot sied you cannot sied they cannot sied	I cannot be sieding you cannot be sieding he 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 he 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 he 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 he sied? can we sied? can you sied? can they sied?	can I be sieding? can you be sieding? can he 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 he 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 he 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 he 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 he 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 he 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 he not have been sieding? can we not have been sieding? can you not have been sieding? can they not have been sieding?