English verb conjugation
CAN SPARK

Regular verb: spark - sparked - sparked

Affirmation

Simple form	V-ing form
I can spark you can spark he can spark we can spark you can spark they can spark	I can be sparking you can be sparking he can be sparking we can be sparking you can be sparking they can be sparking
Perfect	V-ing perfect
I can have sparked you can have sparked he can have sparked we can have sparked you can have sparked they can have sparked	I can have been sparking you can have been sparking he can have been sparking we can have been sparking you can have been sparking they can have been sparking

Negation

Simple form	V-ing form
I cannot spark you cannot spark he cannot spark we cannot spark you cannot spark they cannot spark	I cannot be sparking you cannot be sparking he cannot be sparking we cannot be sparking you cannot be sparking they cannot be sparking
Perfect	V-ing perfect
I cannot have sparked you cannot have sparked he cannot have sparked we cannot have sparked you cannot have sparked they cannot have sparked	I cannot have been sparking you cannot have been sparking he cannot have been sparking we cannot have been sparking you cannot have been sparking they cannot have been sparking

Interrogative form

Simple form	V-ing form
can I spark? can you spark? can he spark? can we spark? can you spark? can they spark?	can I be sparking? can you be sparking? can he be sparking? can we be sparking? can you be sparking? can they be sparking?
Perfect	V-ing perfect
can I have sparked? can you have sparked? can he have sparked? can we have sparked? can you have sparked? can they have sparked?	can I have been sparking? can you have been sparking? can he have been sparking? can we have been sparking? can you have been sparking? can they have been sparking?

Interro-negative form

Simple form	V-ing form
can I not spark? can you not spark? can he not spark? can we not spark? can you not spark? can they not spark?	can I not be sparking? can you not be sparking? can he not be sparking? can we not be sparking? can you not be sparking? can they not be sparking?
Perfect	V-ing perfect
can I not have sparked? can you not have sparked? can he not have sparked? can we not have sparked? can you not have sparked? can they not have sparked?	can I not have been sparking? can you not have been sparking? can he not have been sparking? can we not have been sparking? can you not have been sparking? can they not have been sparking?