could tidy
Regular verb: tidy - tidied- tidied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tidy
you could tidy
he could tidy
we could tidy
you could tidy
they could tidy 	I could be tidying
you could be tidying
he could be tidying
we could be tidying
you could be tidying
they could be tidying	I could have tidied
you could have tidied
he could have tidied
we could have tidied
you could have tidied
they could have tidied	I could have been tidying
you could have been tidying
he could have been tidying
we could have been tidying
you could have been tidying
they could have been tidying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tidy
you couldn't tidy
he couldn't tidy
we couldn't tidy
you couldn't tidy
they couldn't tidy 	I couldn't be tidying
you couldn't be tidying
he couldn't be tidying
we couldn't be tidying
you couldn't be tidying
they couldn't be tidying	I couldn't have tidied
you couldn't have tidied
he couldn't have tidied
we couldn't have tidied
you couldn't have tidied
they couldn't have tidied	I couldn't have been tidying
you couldn't have been tidying
he couldn't have been tidying
we couldn't have been tidying
you couldn't have been tidying
they couldn't have been tidying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tidy?
could you tidy?
could he tidy?
could we tidy?
could you tidy?
could they tidy? 	could I be tidying?
could you be tidying?
could he be tidying?
could we be tidying?
could you be tidying?
could they be tidying? 	could I have tidied?
could you have tidied?
could he have tidied?
could we have tidied?
could you have tidied?
could they have tidied? 	could I have been tidying?
could you have been tidying?
could he have been tidying?
could we have been tidying?
could you have been tidying?
could they have been tidying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tidy?
couldn't you tidy?
couldn't he tidy?
couldn't we tidy?
couldn't you tidy?
couldn't they tidy? 	couldn't I be tidying?
couldn't you be tidying?
couldn't he be tidying?
couldn't we be tidying?
couldn't you be tidying?
couldn't they be tidying? 	couldn't I have tidied?
couldn't you have tidied?
couldn't he have tidied?
couldn't we have tidied?
couldn't you have tidied?
couldn't they have tidied? 	couldn't I have been tidying?
couldn't you have been tidying?
couldn't he have been tidying?
couldn't we have been tidying?
couldn't you have been tidying?
couldn't they have been tidying?