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 can't spark you can't spark he can't spark we can't spark you can't spark they can't spark	I can't be sparking you can't be sparking he can't be sparking we can't be sparking you can't be sparking they can't be sparking
Perfect	V-ing perfect
I can't have sparked you can't have sparked he can't have sparked we can't have sparked you can't have sparked they can't have sparked	I can't have been sparking you can't have been sparking he can't have been sparking we can't have been sparking you can't have been sparking they can't 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't I spark? can't you spark? can't he spark? can't we spark? can't you spark? can't they spark?	can't I be sparking? can't you be sparking? can't he be sparking? can't we be sparking? can't you be sparking? can't they be sparking?
Perfect	V-ing perfect
can't I have sparked? can't you have sparked? can't he have sparked? can't we have sparked? can't you have sparked? can't they have sparked?	can't I have been sparking? can't you have been sparking? can't he have been sparking? can't we have been sparking? can't you have been sparking? can't they have been sparking?