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 cannot twin you cannot twin he cannot twin we cannot twin you cannot twin they cannot twin	I cannot be twinning you cannot be twinning he cannot be twinning we cannot be twinning you cannot be twinning they cannot be twinning
Perfect	V-ing perfect
I cannot have twinned you cannot have twinned he cannot have twinned we cannot have twinned you cannot have twinned they cannot have twinned	I cannot have been twinning you cannot have been twinning he cannot have been twinning we cannot have been twinning you cannot have been twinning they cannot 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 I not twin? can you not twin? can he not twin? can we not twin? can you not twin? can they not twin?	can I not be twinning? can you not be twinning? can he not be twinning? can we not be twinning? can you not be twinning? can they not be twinning?
Perfect	V-ing perfect
can I not have twinned? can you not have twinned? can he not have twinned? can we not have twinned? can you not have twinned? can they not have twinned?	can I not have been twinning? can you not have been twinning? can he not have been twinning? can we not have been twinning? can you not have been twinning? can they not have been twinning?