English verb conjugation
COULD REHEARSE

Regular verb: rehearse - rehearsed - rehearsed

Affirmation

Simple form	V-ing form
I could rehearse you could rehearse he could rehearse we could rehearse you could rehearse they could rehearse	I could be rehearsing you could be rehearsing he could be rehearsing we could be rehearsing you could be rehearsing they could be rehearsing
Perfect	V-ing perfect
I could have rehearsed you could have rehearsed he could have rehearsed we could have rehearsed you could have rehearsed they could have rehearsed	I could have been rehearsing you could have been rehearsing he could have been rehearsing we could have been rehearsing you could have been rehearsing they could have been rehearsing

Negation

Simple form	V-ing form
I couldn't rehearse you couldn't rehearse he couldn't rehearse we couldn't rehearse you couldn't rehearse they couldn't rehearse	I couldn't be rehearsing you couldn't be rehearsing he couldn't be rehearsing we couldn't be rehearsing you couldn't be rehearsing they couldn't be rehearsing
Perfect	V-ing perfect
I couldn't have rehearsed you couldn't have rehearsed he couldn't have rehearsed we couldn't have rehearsed you couldn't have rehearsed they couldn't have rehearsed	I couldn't have been rehearsing you couldn't have been rehearsing he couldn't have been rehearsing we couldn't have been rehearsing you couldn't have been rehearsing they couldn't have been rehearsing

Interrogative form

Simple form	V-ing form
could I rehearse? could you rehearse? could he rehearse? could we rehearse? could you rehearse? could they rehearse?	could I be rehearsing? could you be rehearsing? could he be rehearsing? could we be rehearsing? could you be rehearsing? could they be rehearsing?
Perfect	V-ing perfect
could I have rehearsed? could you have rehearsed? could he have rehearsed? could we have rehearsed? could you have rehearsed? could they have rehearsed?	could I have been rehearsing? could you have been rehearsing? could he have been rehearsing? could we have been rehearsing? could you have been rehearsing? could they have been rehearsing?

Interro-negative form

Simple form	V-ing form
couldn't I rehearse? couldn't you rehearse? couldn't he rehearse? couldn't we rehearse? couldn't you rehearse? couldn't they rehearse?	couldn't I be rehearsing? couldn't you be rehearsing? couldn't he be rehearsing? couldn't we be rehearsing? couldn't you be rehearsing? couldn't they be rehearsing?
Perfect	V-ing perfect
couldn't I have rehearsed? couldn't you have rehearsed? couldn't he have rehearsed? couldn't we have rehearsed? couldn't you have rehearsed? couldn't they have rehearsed?	couldn't I have been rehearsing? couldn't you have been rehearsing? couldn't he have been rehearsing? couldn't we have been rehearsing? couldn't you have been rehearsing? couldn't they have been rehearsing?