English verb conjugation
CAN TWIN

Regular verb: twin - twinned - twinned

Affirmation

Simple form	V-ing form
I can twin you can twin he can twin we can twin you can twin they can twin	I can be twinning you can be twinning he can be twinning we can be twinning you can be twinning they can be twinning
Perfect	V-ing perfect
I can have twinned you can have twinned he can have twinned we can have twinned you can have twinned they can have twinned	I can have been twinning you can have been twinning he can have been twinning we can have been twinning you can have been twinning they can have been twinning

Negation

Simple form	V-ing form
I can't twin you can't twin he can't twin we can't twin you can't twin they can't twin	I can't be twinning you can't be twinning he can't be twinning we can't be twinning you can't be twinning they can't be twinning
Perfect	V-ing perfect
I can't have twinned you can't have twinned he can't have twinned we can't have twinned you can't have twinned they can't have twinned	I can't have been twinning you can't have been twinning he can't have been twinning we can't have been twinning you can't have been twinning they can't have been twinning

Interrogative form

Simple form	V-ing form
can I twin? can you twin? can he twin? can we twin? can you twin? can they twin?	can I be twinning? can you be twinning? can he be twinning? can we be twinning? can you be twinning? can they be twinning?
Perfect	V-ing perfect
can I have twinned? can you have twinned? can he have twinned? can we have twinned? can you have twinned? can they have twinned?	can I have been twinning? can you have been twinning? can he have been twinning? can we have been twinning? can you have been twinning? can they have been twinning?

Interro-negative form

Simple form	V-ing form
can't I twin? can't you twin? can't he twin? can't we twin? can't you twin? can't they twin?	can't I be twinning? can't you be twinning? can't he be twinning? can't we be twinning? can't you be twinning? can't they be twinning?
Perfect	V-ing perfect
can't I have twinned? can't you have twinned? can't he have twinned? can't we have twinned? can't you have twinned? can't they have twinned?	can't I have been twinning? can't you have been twinning? can't he have been twinning? can't we have been twinning? can't you have been twinning? can't they have been twinning?