I could palpitate you could palpitate she could palpitate we could palpitate you could palpitate they could palpitate
V-ing form
I could be palpitating you could be palpitating she could be palpitating we could be palpitating you could be palpitating they could be palpitating
Perfect
I could have palpitated you could have palpitated she could have palpitated we could have palpitated you could have palpitated they could have palpitated
V-ing perfect
I could have been palpitating you could have been palpitating she could have been palpitating we could have been palpitating you could have been palpitating they could have been palpitating
Negation
Simple form
I could not palpitate you could not palpitate she could not palpitate we could not palpitate you could not palpitate they could not palpitate
V-ing form
I could not be palpitating you could not be palpitating she could not be palpitating we could not be palpitating you could not be palpitating they could not be palpitating
Perfect
I could not have palpitated you could not have palpitated she could not have palpitated we could not have palpitated you could not have palpitated they could not have palpitated
V-ing perfect
I could not have been palpitating you could not have been palpitating she could not have been palpitating we could not have been palpitating you could not have been palpitating they could not have been palpitating
Interrogative form
Simple form
could I palpitate? could you palpitate? could she palpitate? could we palpitate? could you palpitate? could they palpitate?
V-ing form
could I be palpitating? could you be palpitating? could she be palpitating? could we be palpitating? could you be palpitating? could they be palpitating?
Perfect
could I have palpitated? could you have palpitated? could she have palpitated? could we have palpitated? could you have palpitated? could they have palpitated?
V-ing perfect
could I have been palpitating? could you have been palpitating? could she have been palpitating? could we have been palpitating? could you have been palpitating? could they have been palpitating?
Interro-negative form
Simple form
could I not palpitate? could you not palpitate? could she not palpitate? could we not palpitate? could you not palpitate? could they not palpitate?
V-ing form
could I not be palpitating? could you not be palpitating? could she not be palpitating? could we not be palpitating? could you not be palpitating? could they not be palpitating?
Perfect
could I not have palpitated? could you not have palpitated? could she not have palpitated? could we not have palpitated? could you not have palpitated? could they not have palpitated?
V-ing perfect
could I not have been palpitating? could you not have been palpitating? could she not have been palpitating? could we not have been palpitating? could you not have been palpitating? could they not have been palpitating?