could syllogize
Regular verb: syllogize - syllogized- syllogized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could syllogize
you could syllogize
she could syllogize
we could syllogize
you could syllogize
they could syllogize 	I could be syllogizing
you could be syllogizing
she could be syllogizing
we could be syllogizing
you could be syllogizing
they could be syllogizing	I could have syllogized
you could have syllogized
she could have syllogized
we could have syllogized
you could have syllogized
they could have syllogized	I could have been syllogizing
you could have been syllogizing
she could have been syllogizing
we could have been syllogizing
you could have been syllogizing
they could have been syllogizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not syllogize
you could not syllogize
she could not syllogize
we could not syllogize
you could not syllogize
they could not syllogize 	I could not be syllogizing
you could not be syllogizing
she could not be syllogizing
we could not be syllogizing
you could not be syllogizing
they could not be syllogizing	I could not have syllogized
you could not have syllogized
she could not have syllogized
we could not have syllogized
you could not have syllogized
they could not have syllogized	I could not have been syllogizing
you could not have been syllogizing
she could not have been syllogizing
we could not have been syllogizing
you could not have been syllogizing
they could not have been syllogizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I syllogize?
could you syllogize?
could she syllogize?
could we syllogize?
could you syllogize?
could they syllogize? 	could I be syllogizing?
could you be syllogizing?
could she be syllogizing?
could we be syllogizing?
could you be syllogizing?
could they be syllogizing? 	could I have syllogized?
could you have syllogized?
could she have syllogized?
could we have syllogized?
could you have syllogized?
could they have syllogized? 	could I have been syllogizing?
could you have been syllogizing?
could she have been syllogizing?
could we have been syllogizing?
could you have been syllogizing?
could they have been syllogizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not syllogize?
could you not syllogize?
could she not syllogize?
could we not syllogize?
could you not syllogize?
could they not syllogize? 	could I not be syllogizing?
could you not be syllogizing?
could she not be syllogizing?
could we not be syllogizing?
could you not be syllogizing?
could they not be syllogizing? 	could I not have syllogized?
could you not have syllogized?
could she not have syllogized?
could we not have syllogized?
could you not have syllogized?
could they not have syllogized? 	could I not have been syllogizing?
could you not have been syllogizing?
could she not have been syllogizing?
could we not have been syllogizing?
could you not have been syllogizing?
could they not have been syllogizing?