could syllogise
Regular verb: syllogise - syllogised- syllogised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could syllogise
you could syllogise
he could syllogise
we could syllogise
you could syllogise
they could syllogise 	I could be syllogising
you could be syllogising
he could be syllogising
we could be syllogising
you could be syllogising
they could be syllogising	I could have syllogised
you could have syllogised
he could have syllogised
we could have syllogised
you could have syllogised
they could have syllogised	I could have been syllogising
you could have been syllogising
he could have been syllogising
we could have been syllogising
you could have been syllogising
they could have been syllogising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't syllogise
you couldn't syllogise
he couldn't syllogise
we couldn't syllogise
you couldn't syllogise
they couldn't syllogise 	I couldn't be syllogising
you couldn't be syllogising
he couldn't be syllogising
we couldn't be syllogising
you couldn't be syllogising
they couldn't be syllogising	I couldn't have syllogised
you couldn't have syllogised
he couldn't have syllogised
we couldn't have syllogised
you couldn't have syllogised
they couldn't have syllogised	I couldn't have been syllogising
you couldn't have been syllogising
he couldn't have been syllogising
we couldn't have been syllogising
you couldn't have been syllogising
they couldn't have been syllogising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I syllogise?
could you syllogise?
could he syllogise?
could we syllogise?
could you syllogise?
could they syllogise? 	could I be syllogising?
could you be syllogising?
could he be syllogising?
could we be syllogising?
could you be syllogising?
could they be syllogising? 	could I have syllogised?
could you have syllogised?
could he have syllogised?
could we have syllogised?
could you have syllogised?
could they have syllogised? 	could I have been syllogising?
could you have been syllogising?
could he have been syllogising?
could we have been syllogising?
could you have been syllogising?
could they have been syllogising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I syllogise?
couldn't you syllogise?
couldn't he syllogise?
couldn't we syllogise?
couldn't you syllogise?
couldn't they syllogise? 	couldn't I be syllogising?
couldn't you be syllogising?
couldn't he be syllogising?
couldn't we be syllogising?
couldn't you be syllogising?
couldn't they be syllogising? 	couldn't I have syllogised?
couldn't you have syllogised?
couldn't he have syllogised?
couldn't we have syllogised?
couldn't you have syllogised?
couldn't they have syllogised? 	couldn't I have been syllogising?
couldn't you have been syllogising?
couldn't he have been syllogising?
couldn't we have been syllogising?
couldn't you have been syllogising?
couldn't they have been syllogising?