could act
Regular verb: act - acted- acted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could act
you could act
she could act
we could act
you could act
they could act 	I could be acting
you could be acting
she could be acting
we could be acting
you could be acting
they could be acting	I could have acted
you could have acted
she could have acted
we could have acted
you could have acted
they could have acted	I could have been acting
you could have been acting
she could have been acting
we could have been acting
you could have been acting
they could have been acting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't act
you couldn't act
she couldn't act
we couldn't act
you couldn't act
they couldn't act 	I couldn't be acting
you couldn't be acting
she couldn't be acting
we couldn't be acting
you couldn't be acting
they couldn't be acting	I couldn't have acted
you couldn't have acted
she couldn't have acted
we couldn't have acted
you couldn't have acted
they couldn't have acted	I couldn't have been acting
you couldn't have been acting
she couldn't have been acting
we couldn't have been acting
you couldn't have been acting
they couldn't have been acting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I act?
could you act?
could she act?
could we act?
could you act?
could they act? 	could I be acting?
could you be acting?
could she be acting?
could we be acting?
could you be acting?
could they be acting? 	could I have acted?
could you have acted?
could she have acted?
could we have acted?
could you have acted?
could they have acted? 	could I have been acting?
could you have been acting?
could she have been acting?
could we have been acting?
could you have been acting?
could they have been acting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I act?
couldn't you act?
couldn't she act?
couldn't we act?
couldn't you act?
couldn't they act? 	couldn't I be acting?
couldn't you be acting?
couldn't she be acting?
couldn't we be acting?
couldn't you be acting?
couldn't they be acting? 	couldn't I have acted?
couldn't you have acted?
couldn't she have acted?
couldn't we have acted?
couldn't you have acted?
couldn't they have acted? 	couldn't I have been acting?
couldn't you have been acting?
couldn't she have been acting?
couldn't we have been acting?
couldn't you have been acting?
couldn't they have been acting?