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 can't gas you can't gas he can't gas we can't gas you can't gas they can't gas	I can't be gassing you can't be gassing he can't be gassing we can't be gassing you can't be gassing they can't be gassing
Perfect	V-ing perfect
I can't have gassed you can't have gassed he can't have gassed we can't have gassed you can't have gassed they can't have gassed	I can't have been gassing you can't have been gassing he can't have been gassing we can't have been gassing you can't have been gassing they can't 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't I gas? can't you gas? can't he gas? can't we gas? can't you gas? can't they gas?	can't I be gassing? can't you be gassing? can't he be gassing? can't we be gassing? can't you be gassing? can't they be gassing?
Perfect	V-ing perfect
can't I have gassed? can't you have gassed? can't he have gassed? can't we have gassed? can't you have gassed? can't they have gassed?	can't I have been gassing? can't you have been gassing? can't he have been gassing? can't we have been gassing? can't you have been gassing? can't they have been gassing?