English verb conjugation
CAN GAS

Regular verb: gas - gassed - gassed

Affirmation

Simple form	V-ing form
I can gas you can gas he can gas we can gas you can gas they can gas	I can be gassing you can be gassing he can be gassing we can be gassing you can be gassing they can be gassing
Perfect	V-ing perfect
I can have gassed you can have gassed he can have gassed we can have gassed you can have gassed they can have gassed	I can have been gassing you can have been gassing he can have been gassing we can have been gassing you can have been gassing they can have been gassing

Negation

Simple form	V-ing form
I cannot gas you cannot gas he cannot gas we cannot gas you cannot gas they cannot gas	I cannot be gassing you cannot be gassing he cannot be gassing we cannot be gassing you cannot be gassing they cannot be gassing
Perfect	V-ing perfect
I cannot have gassed you cannot have gassed he cannot have gassed we cannot have gassed you cannot have gassed they cannot have gassed	I cannot have been gassing you cannot have been gassing he cannot have been gassing we cannot have been gassing you cannot have been gassing they cannot have been gassing

Interrogative form

Simple form	V-ing form
can I gas? can you gas? can he gas? can we gas? can you gas? can they gas?	can I be gassing? can you be gassing? can he be gassing? can we be gassing? can you be gassing? can they be gassing?
Perfect	V-ing perfect
can I have gassed? can you have gassed? can he have gassed? can we have gassed? can you have gassed? can they have gassed?	can I have been gassing? can you have been gassing? can he have been gassing? can we have been gassing? can you have been gassing? can they have been gassing?

Interro-negative form

Simple form	V-ing form
can I not gas? can you not gas? can he not gas? can we not gas? can you not gas? can they not gas?	can I not be gassing? can you not be gassing? can he not be gassing? can we not be gassing? can you not be gassing? can they not be gassing?
Perfect	V-ing perfect
can I not have gassed? can you not have gassed? can he not have gassed? can we not have gassed? can you not have gassed? can they not have gassed?	can I not have been gassing? can you not have been gassing? can he not have been gassing? can we not have been gassing? can you not have been gassing? can they not have been gassing?