could radiate
Regular verb: radiate - radiated- radiated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could radiate
you could radiate
she could radiate
we could radiate
you could radiate
they could radiate 	I could be radiating
you could be radiating
she could be radiating
we could be radiating
you could be radiating
they could be radiating	I could have radiated
you could have radiated
she could have radiated
we could have radiated
you could have radiated
they could have radiated	I could have been radiating
you could have been radiating
she could have been radiating
we could have been radiating
you could have been radiating
they could have been radiating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't radiate
you couldn't radiate
she couldn't radiate
we couldn't radiate
you couldn't radiate
they couldn't radiate 	I couldn't be radiating
you couldn't be radiating
she couldn't be radiating
we couldn't be radiating
you couldn't be radiating
they couldn't be radiating	I couldn't have radiated
you couldn't have radiated
she couldn't have radiated
we couldn't have radiated
you couldn't have radiated
they couldn't have radiated	I couldn't have been radiating
you couldn't have been radiating
she couldn't have been radiating
we couldn't have been radiating
you couldn't have been radiating
they couldn't have been radiating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I radiate?
could you radiate?
could she radiate?
could we radiate?
could you radiate?
could they radiate? 	could I be radiating?
could you be radiating?
could she be radiating?
could we be radiating?
could you be radiating?
could they be radiating? 	could I have radiated?
could you have radiated?
could she have radiated?
could we have radiated?
could you have radiated?
could they have radiated? 	could I have been radiating?
could you have been radiating?
could she have been radiating?
could we have been radiating?
could you have been radiating?
could they have been radiating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I radiate?
couldn't you radiate?
couldn't she radiate?
couldn't we radiate?
couldn't you radiate?
couldn't they radiate? 	couldn't I be radiating?
couldn't you be radiating?
couldn't she be radiating?
couldn't we be radiating?
couldn't you be radiating?
couldn't they be radiating? 	couldn't I have radiated?
couldn't you have radiated?
couldn't she have radiated?
couldn't we have radiated?
couldn't you have radiated?
couldn't they have radiated? 	couldn't I have been radiating?
couldn't you have been radiating?
couldn't she have been radiating?
couldn't we have been radiating?
couldn't you have been radiating?
couldn't they have been radiating?