English verb conjugation
CAN GRIN

Regular verb: grin - grinned - grinned

Affirmation

Simple form	V-ing form
I can grin you can grin he can grin we can grin you can grin they can grin	I can be grinning you can be grinning he can be grinning we can be grinning you can be grinning they can be grinning
Perfect	V-ing perfect
I can have grinned you can have grinned he can have grinned we can have grinned you can have grinned they can have grinned	I can have been grinning you can have been grinning he can have been grinning we can have been grinning you can have been grinning they can have been grinning

Negation

Simple form	V-ing form
I can't grin you can't grin he can't grin we can't grin you can't grin they can't grin	I can't be grinning you can't be grinning he can't be grinning we can't be grinning you can't be grinning they can't be grinning
Perfect	V-ing perfect
I can't have grinned you can't have grinned he can't have grinned we can't have grinned you can't have grinned they can't have grinned	I can't have been grinning you can't have been grinning he can't have been grinning we can't have been grinning you can't have been grinning they can't have been grinning

Interrogative form

Simple form	V-ing form
can I grin? can you grin? can he grin? can we grin? can you grin? can they grin?	can I be grinning? can you be grinning? can he be grinning? can we be grinning? can you be grinning? can they be grinning?
Perfect	V-ing perfect
can I have grinned? can you have grinned? can he have grinned? can we have grinned? can you have grinned? can they have grinned?	can I have been grinning? can you have been grinning? can he have been grinning? can we have been grinning? can you have been grinning? can they have been grinning?

Interro-negative form

Simple form	V-ing form
can't I grin? can't you grin? can't he grin? can't we grin? can't you grin? can't they grin?	can't I be grinning? can't you be grinning? can't he be grinning? can't we be grinning? can't you be grinning? can't they be grinning?
Perfect	V-ing perfect
can't I have grinned? can't you have grinned? can't he have grinned? can't we have grinned? can't you have grinned? can't they have grinned?	can't I have been grinning? can't you have been grinning? can't he have been grinning? can't we have been grinning? can't you have been grinning? can't they have been grinning?