could hiccough
Regular verb: hiccough - hiccoughed- hiccoughed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could hiccough
you could hiccough
he could hiccough
we could hiccough
you could hiccough
they could hiccough 	I could be hiccoughing
you could be hiccoughing
he could be hiccoughing
we could be hiccoughing
you could be hiccoughing
they could be hiccoughing	I could have hiccoughed
you could have hiccoughed
he could have hiccoughed
we could have hiccoughed
you could have hiccoughed
they could have hiccoughed	I could have been hiccoughing
you could have been hiccoughing
he could have been hiccoughing
we could have been hiccoughing
you could have been hiccoughing
they could have been hiccoughing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not hiccough
you could not hiccough
he could not hiccough
we could not hiccough
you could not hiccough
they could not hiccough 	I could not be hiccoughing
you could not be hiccoughing
he could not be hiccoughing
we could not be hiccoughing
you could not be hiccoughing
they could not be hiccoughing	I could not have hiccoughed
you could not have hiccoughed
he could not have hiccoughed
we could not have hiccoughed
you could not have hiccoughed
they could not have hiccoughed	I could not have been hiccoughing
you could not have been hiccoughing
he could not have been hiccoughing
we could not have been hiccoughing
you could not have been hiccoughing
they could not have been hiccoughing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I hiccough?
could you hiccough?
could he hiccough?
could we hiccough?
could you hiccough?
could they hiccough? 	could I be hiccoughing?
could you be hiccoughing?
could he be hiccoughing?
could we be hiccoughing?
could you be hiccoughing?
could they be hiccoughing? 	could I have hiccoughed?
could you have hiccoughed?
could he have hiccoughed?
could we have hiccoughed?
could you have hiccoughed?
could they have hiccoughed? 	could I have been hiccoughing?
could you have been hiccoughing?
could he have been hiccoughing?
could we have been hiccoughing?
could you have been hiccoughing?
could they have been hiccoughing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not hiccough?
could you not hiccough?
could he not hiccough?
could we not hiccough?
could you not hiccough?
could they not hiccough? 	could I not be hiccoughing?
could you not be hiccoughing?
could he not be hiccoughing?
could we not be hiccoughing?
could you not be hiccoughing?
could they not be hiccoughing? 	could I not have hiccoughed?
could you not have hiccoughed?
could he not have hiccoughed?
could we not have hiccoughed?
could you not have hiccoughed?
could they not have hiccoughed? 	could I not have been hiccoughing?
could you not have been hiccoughing?
could he not have been hiccoughing?
could we not have been hiccoughing?
could you not have been hiccoughing?
could they not have been hiccoughing?