could underload
Regular verb: underload - underloaded- underloaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could underload
you could underload
she could underload
we could underload
you could underload
they could underload 	I could be underloading
you could be underloading
she could be underloading
we could be underloading
you could be underloading
they could be underloading	I could have underloaded
you could have underloaded
she could have underloaded
we could have underloaded
you could have underloaded
they could have underloaded	I could have been underloading
you could have been underloading
she could have been underloading
we could have been underloading
you could have been underloading
they could have been underloading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't underload
you couldn't underload
she couldn't underload
we couldn't underload
you couldn't underload
they couldn't underload 	I couldn't be underloading
you couldn't be underloading
she couldn't be underloading
we couldn't be underloading
you couldn't be underloading
they couldn't be underloading	I couldn't have underloaded
you couldn't have underloaded
she couldn't have underloaded
we couldn't have underloaded
you couldn't have underloaded
they couldn't have underloaded	I couldn't have been underloading
you couldn't have been underloading
she couldn't have been underloading
we couldn't have been underloading
you couldn't have been underloading
they couldn't have been underloading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I underload?
could you underload?
could she underload?
could we underload?
could you underload?
could they underload? 	could I be underloading?
could you be underloading?
could she be underloading?
could we be underloading?
could you be underloading?
could they be underloading? 	could I have underloaded?
could you have underloaded?
could she have underloaded?
could we have underloaded?
could you have underloaded?
could they have underloaded? 	could I have been underloading?
could you have been underloading?
could she have been underloading?
could we have been underloading?
could you have been underloading?
could they have been underloading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I underload?
couldn't you underload?
couldn't she underload?
couldn't we underload?
couldn't you underload?
couldn't they underload? 	couldn't I be underloading?
couldn't you be underloading?
couldn't she be underloading?
couldn't we be underloading?
couldn't you be underloading?
couldn't they be underloading? 	couldn't I have underloaded?
couldn't you have underloaded?
couldn't she have underloaded?
couldn't we have underloaded?
couldn't you have underloaded?
couldn't they have underloaded? 	couldn't I have been underloading?
couldn't you have been underloading?
couldn't she have been underloading?
couldn't we have been underloading?
couldn't you have been underloading?
couldn't they have been underloading?