English verb conjugation
CAN MARBLE

Regular verb: marble - marbled - marbled

Affirmation

Simple form	V-ing form
I can marble you can marble he can marble we can marble you can marble they can marble	I can be marbling you can be marbling he can be marbling we can be marbling you can be marbling they can be marbling
Perfect	V-ing perfect
I can have marbled you can have marbled he can have marbled we can have marbled you can have marbled they can have marbled	I can have been marbling you can have been marbling he can have been marbling we can have been marbling you can have been marbling they can have been marbling

Negation

Simple form	V-ing form
I can't marble you can't marble he can't marble we can't marble you can't marble they can't marble	I can't be marbling you can't be marbling he can't be marbling we can't be marbling you can't be marbling they can't be marbling
Perfect	V-ing perfect
I can't have marbled you can't have marbled he can't have marbled we can't have marbled you can't have marbled they can't have marbled	I can't have been marbling you can't have been marbling he can't have been marbling we can't have been marbling you can't have been marbling they can't have been marbling

Interrogative form

Simple form	V-ing form
can I marble? can you marble? can he marble? can we marble? can you marble? can they marble?	can I be marbling? can you be marbling? can he be marbling? can we be marbling? can you be marbling? can they be marbling?
Perfect	V-ing perfect
can I have marbled? can you have marbled? can he have marbled? can we have marbled? can you have marbled? can they have marbled?	can I have been marbling? can you have been marbling? can he have been marbling? can we have been marbling? can you have been marbling? can they have been marbling?

Interro-negative form

Simple form	V-ing form
can't I marble? can't you marble? can't he marble? can't we marble? can't you marble? can't they marble?	can't I be marbling? can't you be marbling? can't he be marbling? can't we be marbling? can't you be marbling? can't they be marbling?
Perfect	V-ing perfect
can't I have marbled? can't you have marbled? can't he have marbled? can't we have marbled? can't you have marbled? can't they have marbled?	can't I have been marbling? can't you have been marbling? can't he have been marbling? can't we have been marbling? can't you have been marbling? can't they have been marbling?