could stir
Regular verb: stir - stirred- stirred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stir
you could stir
she could stir
we could stir
you could stir
they could stir 	I could be stirring
you could be stirring
she could be stirring
we could be stirring
you could be stirring
they could be stirring	I could have stirred
you could have stirred
she could have stirred
we could have stirred
you could have stirred
they could have stirred	I could have been stirring
you could have been stirring
she could have been stirring
we could have been stirring
you could have been stirring
they could have been stirring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't stir
you couldn't stir
she couldn't stir
we couldn't stir
you couldn't stir
they couldn't stir 	I couldn't be stirring
you couldn't be stirring
she couldn't be stirring
we couldn't be stirring
you couldn't be stirring
they couldn't be stirring	I couldn't have stirred
you couldn't have stirred
she couldn't have stirred
we couldn't have stirred
you couldn't have stirred
they couldn't have stirred	I couldn't have been stirring
you couldn't have been stirring
she couldn't have been stirring
we couldn't have been stirring
you couldn't have been stirring
they couldn't have been stirring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I stir?
could you stir?
could she stir?
could we stir?
could you stir?
could they stir? 	could I be stirring?
could you be stirring?
could she be stirring?
could we be stirring?
could you be stirring?
could they be stirring? 	could I have stirred?
could you have stirred?
could she have stirred?
could we have stirred?
could you have stirred?
could they have stirred? 	could I have been stirring?
could you have been stirring?
could she have been stirring?
could we have been stirring?
could you have been stirring?
could they have been stirring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I stir?
couldn't you stir?
couldn't she stir?
couldn't we stir?
couldn't you stir?
couldn't they stir? 	couldn't I be stirring?
couldn't you be stirring?
couldn't she be stirring?
couldn't we be stirring?
couldn't you be stirring?
couldn't they be stirring? 	couldn't I have stirred?
couldn't you have stirred?
couldn't she have stirred?
couldn't we have stirred?
couldn't you have stirred?
couldn't they have stirred? 	couldn't I have been stirring?
couldn't you have been stirring?
couldn't she have been stirring?
couldn't we have been stirring?
couldn't you have been stirring?
couldn't they have been stirring?