I can skirmish you can skirmish he can skirmish we can skirmish you can skirmish they can skirmish
V-ing form
I can be skirmishing you can be skirmishing he can be skirmishing we can be skirmishing you can be skirmishing they can be skirmishing
Perfect
I can have skirmished you can have skirmished he can have skirmished we can have skirmished you can have skirmished they can have skirmished
V-ing perfect
I can have been skirmishing you can have been skirmishing he can have been skirmishing we can have been skirmishing you can have been skirmishing they can have been skirmishing
Negation
Simple form
I cannot skirmish you cannot skirmish he cannot skirmish we cannot skirmish you cannot skirmish they cannot skirmish
V-ing form
I cannot be skirmishing you cannot be skirmishing he cannot be skirmishing we cannot be skirmishing you cannot be skirmishing they cannot be skirmishing
Perfect
I cannot have skirmished you cannot have skirmished he cannot have skirmished we cannot have skirmished you cannot have skirmished they cannot have skirmished
V-ing perfect
I cannot have been skirmishing you cannot have been skirmishing he cannot have been skirmishing we cannot have been skirmishing you cannot have been skirmishing they cannot have been skirmishing
Interrogative form
Simple form
can I skirmish? can you skirmish? can he skirmish? can we skirmish? can you skirmish? can they skirmish?
V-ing form
can I be skirmishing? can you be skirmishing? can he be skirmishing? can we be skirmishing? can you be skirmishing? can they be skirmishing?
Perfect
can I have skirmished? can you have skirmished? can he have skirmished? can we have skirmished? can you have skirmished? can they have skirmished?
V-ing perfect
can I have been skirmishing? can you have been skirmishing? can he have been skirmishing? can we have been skirmishing? can you have been skirmishing? can they have been skirmishing?
Interro-negative form
Simple form
can I not skirmish? can you not skirmish? can he not skirmish? can we not skirmish? can you not skirmish? can they not skirmish?
V-ing form
can I not be skirmishing? can you not be skirmishing? can he not be skirmishing? can we not be skirmishing? can you not be skirmishing? can they not be skirmishing?
Perfect
can I not have skirmished? can you not have skirmished? can he not have skirmished? can we not have skirmished? can you not have skirmished? can they not have skirmished?
V-ing perfect
can I not have been skirmishing? can you not have been skirmishing? can he not have been skirmishing? can we not have been skirmishing? can you not have been skirmishing? can they not have been skirmishing?