could radiotelegraph
Regular verb: radiotelegraph - radiotelegraphed- radiotelegraphed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could radiotelegraph
you could radiotelegraph
he could radiotelegraph
we could radiotelegraph
you could radiotelegraph
they could radiotelegraph 	I could be radiotelegraphing
you could be radiotelegraphing
he could be radiotelegraphing
we could be radiotelegraphing
you could be radiotelegraphing
they could be radiotelegraphing	I could have radiotelegraphed
you could have radiotelegraphed
he could have radiotelegraphed
we could have radiotelegraphed
you could have radiotelegraphed
they could have radiotelegraphed	I could have been radiotelegraphing
you could have been radiotelegraphing
he could have been radiotelegraphing
we could have been radiotelegraphing
you could have been radiotelegraphing
they could have been radiotelegraphing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't radiotelegraph
you couldn't radiotelegraph
he couldn't radiotelegraph
we couldn't radiotelegraph
you couldn't radiotelegraph
they couldn't radiotelegraph 	I couldn't be radiotelegraphing
you couldn't be radiotelegraphing
he couldn't be radiotelegraphing
we couldn't be radiotelegraphing
you couldn't be radiotelegraphing
they couldn't be radiotelegraphing	I couldn't have radiotelegraphed
you couldn't have radiotelegraphed
he couldn't have radiotelegraphed
we couldn't have radiotelegraphed
you couldn't have radiotelegraphed
they couldn't have radiotelegraphed	I couldn't have been radiotelegraphing
you couldn't have been radiotelegraphing
he couldn't have been radiotelegraphing
we couldn't have been radiotelegraphing
you couldn't have been radiotelegraphing
they couldn't have been radiotelegraphing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I radiotelegraph?
could you radiotelegraph?
could he radiotelegraph?
could we radiotelegraph?
could you radiotelegraph?
could they radiotelegraph? 	could I be radiotelegraphing?
could you be radiotelegraphing?
could he be radiotelegraphing?
could we be radiotelegraphing?
could you be radiotelegraphing?
could they be radiotelegraphing? 	could I have radiotelegraphed?
could you have radiotelegraphed?
could he have radiotelegraphed?
could we have radiotelegraphed?
could you have radiotelegraphed?
could they have radiotelegraphed? 	could I have been radiotelegraphing?
could you have been radiotelegraphing?
could he have been radiotelegraphing?
could we have been radiotelegraphing?
could you have been radiotelegraphing?
could they have been radiotelegraphing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I radiotelegraph?
couldn't you radiotelegraph?
couldn't he radiotelegraph?
couldn't we radiotelegraph?
couldn't you radiotelegraph?
couldn't they radiotelegraph? 	couldn't I be radiotelegraphing?
couldn't you be radiotelegraphing?
couldn't he be radiotelegraphing?
couldn't we be radiotelegraphing?
couldn't you be radiotelegraphing?
couldn't they be radiotelegraphing? 	couldn't I have radiotelegraphed?
couldn't you have radiotelegraphed?
couldn't he have radiotelegraphed?
couldn't we have radiotelegraphed?
couldn't you have radiotelegraphed?
couldn't they have radiotelegraphed? 	couldn't I have been radiotelegraphing?
couldn't you have been radiotelegraphing?
couldn't he have been radiotelegraphing?
couldn't we have been radiotelegraphing?
couldn't you have been radiotelegraphing?
couldn't they have been radiotelegraphing?