could intern
Regular verb: intern - interned- interned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could intern
you could intern
she could intern
we could intern
you could intern
they could intern 	I could be interning
you could be interning
she could be interning
we could be interning
you could be interning
they could be interning	I could have interned
you could have interned
she could have interned
we could have interned
you could have interned
they could have interned	I could have been interning
you could have been interning
she could have been interning
we could have been interning
you could have been interning
they could have been interning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not intern
you could not intern
she could not intern
we could not intern
you could not intern
they could not intern 	I could not be interning
you could not be interning
she could not be interning
we could not be interning
you could not be interning
they could not be interning	I could not have interned
you could not have interned
she could not have interned
we could not have interned
you could not have interned
they could not have interned	I could not have been interning
you could not have been interning
she could not have been interning
we could not have been interning
you could not have been interning
they could not have been interning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I intern?
could you intern?
could she intern?
could we intern?
could you intern?
could they intern? 	could I be interning?
could you be interning?
could she be interning?
could we be interning?
could you be interning?
could they be interning? 	could I have interned?
could you have interned?
could she have interned?
could we have interned?
could you have interned?
could they have interned? 	could I have been interning?
could you have been interning?
could she have been interning?
could we have been interning?
could you have been interning?
could they have been interning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not intern?
could you not intern?
could she not intern?
could we not intern?
could you not intern?
could they not intern? 	could I not be interning?
could you not be interning?
could she not be interning?
could we not be interning?
could you not be interning?
could they not be interning? 	could I not have interned?
could you not have interned?
could she not have interned?
could we not have interned?
could you not have interned?
could they not have interned? 	could I not have been interning?
could you not have been interning?
could she not have been interning?
could we not have been interning?
could you not have been interning?
could they not have been interning?