could tumble-dry
Regular verb: tumble-dry - tumble-dried- tumble-dried

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tumble-dry
you could tumble-dry
he could tumble-dry
we could tumble-dry
you could tumble-dry
they could tumble-dry 	I could be tumble-drying
you could be tumble-drying
he could be tumble-drying
we could be tumble-drying
you could be tumble-drying
they could be tumble-drying	I could have tumble-dried
you could have tumble-dried
he could have tumble-dried
we could have tumble-dried
you could have tumble-dried
they could have tumble-dried	I could have been tumble-drying
you could have been tumble-drying
he could have been tumble-drying
we could have been tumble-drying
you could have been tumble-drying
they could have been tumble-drying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tumble-dry
you couldn't tumble-dry
he couldn't tumble-dry
we couldn't tumble-dry
you couldn't tumble-dry
they couldn't tumble-dry 	I couldn't be tumble-drying
you couldn't be tumble-drying
he couldn't be tumble-drying
we couldn't be tumble-drying
you couldn't be tumble-drying
they couldn't be tumble-drying	I couldn't have tumble-dried
you couldn't have tumble-dried
he couldn't have tumble-dried
we couldn't have tumble-dried
you couldn't have tumble-dried
they couldn't have tumble-dried	I couldn't have been tumble-drying
you couldn't have been tumble-drying
he couldn't have been tumble-drying
we couldn't have been tumble-drying
you couldn't have been tumble-drying
they couldn't have been tumble-drying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tumble-dry?
could you tumble-dry?
could he tumble-dry?
could we tumble-dry?
could you tumble-dry?
could they tumble-dry? 	could I be tumble-drying?
could you be tumble-drying?
could he be tumble-drying?
could we be tumble-drying?
could you be tumble-drying?
could they be tumble-drying? 	could I have tumble-dried?
could you have tumble-dried?
could he have tumble-dried?
could we have tumble-dried?
could you have tumble-dried?
could they have tumble-dried? 	could I have been tumble-drying?
could you have been tumble-drying?
could he have been tumble-drying?
could we have been tumble-drying?
could you have been tumble-drying?
could they have been tumble-drying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tumble-dry?
couldn't you tumble-dry?
couldn't he tumble-dry?
couldn't we tumble-dry?
couldn't you tumble-dry?
couldn't they tumble-dry? 	couldn't I be tumble-drying?
couldn't you be tumble-drying?
couldn't he be tumble-drying?
couldn't we be tumble-drying?
couldn't you be tumble-drying?
couldn't they be tumble-drying? 	couldn't I have tumble-dried?
couldn't you have tumble-dried?
couldn't he have tumble-dried?
couldn't we have tumble-dried?
couldn't you have tumble-dried?
couldn't they have tumble-dried? 	couldn't I have been tumble-drying?
couldn't you have been tumble-drying?
couldn't he have been tumble-drying?
couldn't we have been tumble-drying?
couldn't you have been tumble-drying?
couldn't they have been tumble-drying?