English verb conjugation
CAN GRASS

Regular verb: grass - grassed - grassed

Affirmation

Simple form	V-ing form
I can grass you can grass she can grass we can grass you can grass they can grass	I can be grassing you can be grassing she can be grassing we can be grassing you can be grassing they can be grassing
Perfect	V-ing perfect
I can have grassed you can have grassed she can have grassed we can have grassed you can have grassed they can have grassed	I can have been grassing you can have been grassing she can have been grassing we can have been grassing you can have been grassing they can have been grassing

Negation

Simple form	V-ing form
I can't grass you can't grass she can't grass we can't grass you can't grass they can't grass	I can't be grassing you can't be grassing she can't be grassing we can't be grassing you can't be grassing they can't be grassing
Perfect	V-ing perfect
I can't have grassed you can't have grassed she can't have grassed we can't have grassed you can't have grassed they can't have grassed	I can't have been grassing you can't have been grassing she can't have been grassing we can't have been grassing you can't have been grassing they can't have been grassing

Interrogative form

Simple form	V-ing form
can I grass? can you grass? can she grass? can we grass? can you grass? can they grass?	can I be grassing? can you be grassing? can she be grassing? can we be grassing? can you be grassing? can they be grassing?
Perfect	V-ing perfect
can I have grassed? can you have grassed? can she have grassed? can we have grassed? can you have grassed? can they have grassed?	can I have been grassing? can you have been grassing? can she have been grassing? can we have been grassing? can you have been grassing? can they have been grassing?

Interro-negative form

Simple form	V-ing form
can't I grass? can't you grass? can't she grass? can't we grass? can't you grass? can't they grass?	can't I be grassing? can't you be grassing? can't she be grassing? can't we be grassing? can't you be grassing? can't they be grassing?
Perfect	V-ing perfect
can't I have grassed? can't you have grassed? can't she have grassed? can't we have grassed? can't you have grassed? can't they have grassed?	can't I have been grassing? can't you have been grassing? can't she have been grassing? can't we have been grassing? can't you have been grassing? can't they have been grassing?