English verb conjugation
COULD PREANNOUNCE

Regular verb: preannounce - preannounced - preannounced

Affirmation

Simple form	V-ing form
I could preannounce you could preannounce he could preannounce we could preannounce you could preannounce they could preannounce	I could be preannouncing you could be preannouncing he could be preannouncing we could be preannouncing you could be preannouncing they could be preannouncing
Perfect	V-ing perfect
I could have preannounced you could have preannounced he could have preannounced we could have preannounced you could have preannounced they could have preannounced	I could have been preannouncing you could have been preannouncing he could have been preannouncing we could have been preannouncing you could have been preannouncing they could have been preannouncing

Negation

Simple form	V-ing form
I couldn't preannounce you couldn't preannounce he couldn't preannounce we couldn't preannounce you couldn't preannounce they couldn't preannounce	I couldn't be preannouncing you couldn't be preannouncing he couldn't be preannouncing we couldn't be preannouncing you couldn't be preannouncing they couldn't be preannouncing
Perfect	V-ing perfect
I couldn't have preannounced you couldn't have preannounced he couldn't have preannounced we couldn't have preannounced you couldn't have preannounced they couldn't have preannounced	I couldn't have been preannouncing you couldn't have been preannouncing he couldn't have been preannouncing we couldn't have been preannouncing you couldn't have been preannouncing they couldn't have been preannouncing

Interrogative form

Simple form	V-ing form
could I preannounce? could you preannounce? could he preannounce? could we preannounce? could you preannounce? could they preannounce?	could I be preannouncing? could you be preannouncing? could he be preannouncing? could we be preannouncing? could you be preannouncing? could they be preannouncing?
Perfect	V-ing perfect
could I have preannounced? could you have preannounced? could he have preannounced? could we have preannounced? could you have preannounced? could they have preannounced?	could I have been preannouncing? could you have been preannouncing? could he have been preannouncing? could we have been preannouncing? could you have been preannouncing? could they have been preannouncing?

Interro-negative form

Simple form	V-ing form
couldn't I preannounce? couldn't you preannounce? couldn't he preannounce? couldn't we preannounce? couldn't you preannounce? couldn't they preannounce?	couldn't I be preannouncing? couldn't you be preannouncing? couldn't he be preannouncing? couldn't we be preannouncing? couldn't you be preannouncing? couldn't they be preannouncing?
Perfect	V-ing perfect
couldn't I have preannounced? couldn't you have preannounced? couldn't he have preannounced? couldn't we have preannounced? couldn't you have preannounced? couldn't they have preannounced?	couldn't I have been preannouncing? couldn't you have been preannouncing? couldn't he have been preannouncing? couldn't we have been preannouncing? couldn't you have been preannouncing? couldn't they have been preannouncing?