I could levitate you could levitate she could levitate we could levitate you could levitate they could levitate
V-ing form
I could be levitating you could be levitating she could be levitating we could be levitating you could be levitating they could be levitating
Perfect
I could have levitated you could have levitated she could have levitated we could have levitated you could have levitated they could have levitated
V-ing perfect
I could have been levitating you could have been levitating she could have been levitating we could have been levitating you could have been levitating they could have been levitating
Negation
Simple form
I could not levitate you could not levitate she could not levitate we could not levitate you could not levitate they could not levitate
V-ing form
I could not be levitating you could not be levitating she could not be levitating we could not be levitating you could not be levitating they could not be levitating
Perfect
I could not have levitated you could not have levitated she could not have levitated we could not have levitated you could not have levitated they could not have levitated
V-ing perfect
I could not have been levitating you could not have been levitating she could not have been levitating we could not have been levitating you could not have been levitating they could not have been levitating
Interrogative form
Simple form
could I levitate? could you levitate? could she levitate? could we levitate? could you levitate? could they levitate?
V-ing form
could I be levitating? could you be levitating? could she be levitating? could we be levitating? could you be levitating? could they be levitating?
Perfect
could I have levitated? could you have levitated? could she have levitated? could we have levitated? could you have levitated? could they have levitated?
V-ing perfect
could I have been levitating? could you have been levitating? could she have been levitating? could we have been levitating? could you have been levitating? could they have been levitating?
Interro-negative form
Simple form
could I not levitate? could you not levitate? could she not levitate? could we not levitate? could you not levitate? could they not levitate?
V-ing form
could I not be levitating? could you not be levitating? could she not be levitating? could we not be levitating? could you not be levitating? could they not be levitating?
Perfect
could I not have levitated? could you not have levitated? could she not have levitated? could we not have levitated? could you not have levitated? could they not have levitated?
V-ing perfect
could I not have been levitating? could you not have been levitating? could she not have been levitating? could we not have been levitating? could you not have been levitating? could they not have been levitating?