I can stake you can stake she can stake we can stake you can stake they can stake
V-ing form
I can be staking you can be staking she can be staking we can be staking you can be staking they can be staking
Perfect
I can have staked you can have staked she can have staked we can have staked you can have staked they can have staked
V-ing perfect
I can have been staking you can have been staking she can have been staking we can have been staking you can have been staking they can have been staking
Negation
Simple form
I cannot stake you cannot stake she cannot stake we cannot stake you cannot stake they cannot stake
V-ing form
I cannot be staking you cannot be staking she cannot be staking we cannot be staking you cannot be staking they cannot be staking
Perfect
I cannot have staked you cannot have staked she cannot have staked we cannot have staked you cannot have staked they cannot have staked
V-ing perfect
I cannot have been staking you cannot have been staking she cannot have been staking we cannot have been staking you cannot have been staking they cannot have been staking
Interrogative form
Simple form
can I stake? can you stake? can she stake? can we stake? can you stake? can they stake?
V-ing form
can I be staking? can you be staking? can she be staking? can we be staking? can you be staking? can they be staking?
Perfect
can I have staked? can you have staked? can she have staked? can we have staked? can you have staked? can they have staked?
V-ing perfect
can I have been staking? can you have been staking? can she have been staking? can we have been staking? can you have been staking? can they have been staking?
Interro-negative form
Simple form
can I not stake? can you not stake? can she not stake? can we not stake? can you not stake? can they not stake?
V-ing form
can I not be staking? can you not be staking? can she not be staking? can we not be staking? can you not be staking? can they not be staking?
Perfect
can I not have staked? can you not have staked? can she not have staked? can we not have staked? can you not have staked? can they not have staked?
V-ing perfect
can I not have been staking? can you not have been staking? can she not have been staking? can we not have been staking? can you not have been staking? can they not have been staking?