I can jar you can jar he can jar we can jar you can jar they can jar
V-ing form
I can be jarring you can be jarring he can be jarring we can be jarring you can be jarring they can be jarring
Perfect
I can have jarred you can have jarred he can have jarred we can have jarred you can have jarred they can have jarred
V-ing perfect
I can have been jarring you can have been jarring he can have been jarring we can have been jarring you can have been jarring they can have been jarring
Negation
Simple form
I cannot jar you cannot jar he cannot jar we cannot jar you cannot jar they cannot jar
V-ing form
I cannot be jarring you cannot be jarring he cannot be jarring we cannot be jarring you cannot be jarring they cannot be jarring
Perfect
I cannot have jarred you cannot have jarred he cannot have jarred we cannot have jarred you cannot have jarred they cannot have jarred
V-ing perfect
I cannot have been jarring you cannot have been jarring he cannot have been jarring we cannot have been jarring you cannot have been jarring they cannot have been jarring
Interrogative form
Simple form
can I jar? can you jar? can he jar? can we jar? can you jar? can they jar?
V-ing form
can I be jarring? can you be jarring? can he be jarring? can we be jarring? can you be jarring? can they be jarring?
Perfect
can I have jarred? can you have jarred? can he have jarred? can we have jarred? can you have jarred? can they have jarred?
V-ing perfect
can I have been jarring? can you have been jarring? can he have been jarring? can we have been jarring? can you have been jarring? can they have been jarring?
Interro-negative form
Simple form
can I not jar? can you not jar? can he not jar? can we not jar? can you not jar? can they not jar?
V-ing form
can I not be jarring? can you not be jarring? can he not be jarring? can we not be jarring? can you not be jarring? can they not be jarring?
Perfect
can I not have jarred? can you not have jarred? can he not have jarred? can we not have jarred? can you not have jarred? can they not have jarred?
V-ing perfect
can I not have been jarring? can you not have been jarring? can he not have been jarring? can we not have been jarring? can you not have been jarring? can they not have been jarring?