English verb conjugation
CAN SUNBURN

Regular verb: sunburn - sunburned - sunburned

Affirmation

Simple form	V-ing form
I can sunburn you can sunburn he can sunburn we can sunburn you can sunburn they can sunburn	I can be sunburning you can be sunburning he can be sunburning we can be sunburning you can be sunburning they can be sunburning
Perfect	V-ing perfect
I can have sunburned you can have sunburned he can have sunburned we can have sunburned you can have sunburned they can have sunburned	I can have been sunburning you can have been sunburning he can have been sunburning we can have been sunburning you can have been sunburning they can have been sunburning

Negation

Simple form	V-ing form
I cannot sunburn you cannot sunburn he cannot sunburn we cannot sunburn you cannot sunburn they cannot sunburn	I cannot be sunburning you cannot be sunburning he cannot be sunburning we cannot be sunburning you cannot be sunburning they cannot be sunburning
Perfect	V-ing perfect
I cannot have sunburned you cannot have sunburned he cannot have sunburned we cannot have sunburned you cannot have sunburned they cannot have sunburned	I cannot have been sunburning you cannot have been sunburning he cannot have been sunburning we cannot have been sunburning you cannot have been sunburning they cannot have been sunburning

Interrogative form

Simple form	V-ing form
can I sunburn? can you sunburn? can he sunburn? can we sunburn? can you sunburn? can they sunburn?	can I be sunburning? can you be sunburning? can he be sunburning? can we be sunburning? can you be sunburning? can they be sunburning?
Perfect	V-ing perfect
can I have sunburned? can you have sunburned? can he have sunburned? can we have sunburned? can you have sunburned? can they have sunburned?	can I have been sunburning? can you have been sunburning? can he have been sunburning? can we have been sunburning? can you have been sunburning? can they have been sunburning?

Interro-negative form

Simple form	V-ing form
can I not sunburn? can you not sunburn? can he not sunburn? can we not sunburn? can you not sunburn? can they not sunburn?	can I not be sunburning? can you not be sunburning? can he not be sunburning? can we not be sunburning? can you not be sunburning? can they not be sunburning?
Perfect	V-ing perfect
can I not have sunburned? can you not have sunburned? can he not have sunburned? can we not have sunburned? can you not have sunburned? can they not have sunburned?	can I not have been sunburning? can you not have been sunburning? can he not have been sunburning? can we not have been sunburning? can you not have been sunburning? can they not have been sunburning?