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 couldn't syllogize
you couldn't syllogize
she couldn't syllogize
we couldn't syllogize
you couldn't syllogize
they couldn't syllogize 	I couldn't be syllogizing
you couldn't be syllogizing
she couldn't be syllogizing
we couldn't be syllogizing
you couldn't be syllogizing
they couldn't be syllogizing	I couldn't have syllogized
you couldn't have syllogized
she couldn't have syllogized
we couldn't have syllogized
you couldn't have syllogized
they couldn't have syllogized	I couldn't have been syllogizing
you couldn't have been syllogizing
she couldn't have been syllogizing
we couldn't have been syllogizing
you couldn't have been syllogizing
they couldn't 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 	
couldn't I syllogize?
couldn't you syllogize?
couldn't she syllogize?
couldn't we syllogize?
couldn't you syllogize?
couldn't they syllogize? 	couldn't I be syllogizing?
couldn't you be syllogizing?
couldn't she be syllogizing?
couldn't we be syllogizing?
couldn't you be syllogizing?
couldn't they be syllogizing? 	couldn't I have syllogized?
couldn't you have syllogized?
couldn't she have syllogized?
couldn't we have syllogized?
couldn't you have syllogized?
couldn't they have syllogized? 	couldn't I have been syllogizing?
couldn't you have been syllogizing?
couldn't she have been syllogizing?
couldn't we have been syllogizing?
couldn't you have been syllogizing?
couldn't they have been syllogizing?