I can juggle you can juggle she can juggle we can juggle you can juggle they can juggle
V-ing form
I can be juggling you can be juggling she can be juggling we can be juggling you can be juggling they can be juggling
Perfect
I can have juggled you can have juggled she can have juggled we can have juggled you can have juggled they can have juggled
V-ing perfect
I can have been juggling you can have been juggling she can have been juggling we can have been juggling you can have been juggling they can have been juggling
Negation
Simple form
I cannot juggle you cannot juggle she cannot juggle we cannot juggle you cannot juggle they cannot juggle
V-ing form
I cannot be juggling you cannot be juggling she cannot be juggling we cannot be juggling you cannot be juggling they cannot be juggling
Perfect
I cannot have juggled you cannot have juggled she cannot have juggled we cannot have juggled you cannot have juggled they cannot have juggled
V-ing perfect
I cannot have been juggling you cannot have been juggling she cannot have been juggling we cannot have been juggling you cannot have been juggling they cannot have been juggling
Interrogative form
Simple form
can I juggle? can you juggle? can she juggle? can we juggle? can you juggle? can they juggle?
V-ing form
can I be juggling? can you be juggling? can she be juggling? can we be juggling? can you be juggling? can they be juggling?
Perfect
can I have juggled? can you have juggled? can she have juggled? can we have juggled? can you have juggled? can they have juggled?
V-ing perfect
can I have been juggling? can you have been juggling? can she have been juggling? can we have been juggling? can you have been juggling? can they have been juggling?
Interro-negative form
Simple form
can I not juggle? can you not juggle? can she not juggle? can we not juggle? can you not juggle? can they not juggle?
V-ing form
can I not be juggling? can you not be juggling? can she not be juggling? can we not be juggling? can you not be juggling? can they not be juggling?
Perfect
can I not have juggled? can you not have juggled? can she not have juggled? can we not have juggled? can you not have juggled? can they not have juggled?
V-ing perfect
can I not have been juggling? can you not have been juggling? can she not have been juggling? can we not have been juggling? can you not have been juggling? can they not have been juggling?