English verb conjugation
CAN PREEXIST

Regular verb: preexist - preexisted - preexisted

Affirmation

Simple form	V-ing form
I can preexist you can preexist he can preexist we can preexist you can preexist they can preexist	I can be preexisting you can be preexisting he can be preexisting we can be preexisting you can be preexisting they can be preexisting
Perfect	V-ing perfect
I can have preexisted you can have preexisted he can have preexisted we can have preexisted you can have preexisted they can have preexisted	I can have been preexisting you can have been preexisting he can have been preexisting we can have been preexisting you can have been preexisting they can have been preexisting

Negation

Simple form	V-ing form
I can't preexist you can't preexist he can't preexist we can't preexist you can't preexist they can't preexist	I can't be preexisting you can't be preexisting he can't be preexisting we can't be preexisting you can't be preexisting they can't be preexisting
Perfect	V-ing perfect
I can't have preexisted you can't have preexisted he can't have preexisted we can't have preexisted you can't have preexisted they can't have preexisted	I can't have been preexisting you can't have been preexisting he can't have been preexisting we can't have been preexisting you can't have been preexisting they can't have been preexisting

Interrogative form

Simple form	V-ing form
can I preexist? can you preexist? can he preexist? can we preexist? can you preexist? can they preexist?	can I be preexisting? can you be preexisting? can he be preexisting? can we be preexisting? can you be preexisting? can they be preexisting?
Perfect	V-ing perfect
can I have preexisted? can you have preexisted? can he have preexisted? can we have preexisted? can you have preexisted? can they have preexisted?	can I have been preexisting? can you have been preexisting? can he have been preexisting? can we have been preexisting? can you have been preexisting? can they have been preexisting?

Interro-negative form

Simple form	V-ing form
can't I preexist? can't you preexist? can't he preexist? can't we preexist? can't you preexist? can't they preexist?	can't I be preexisting? can't you be preexisting? can't he be preexisting? can't we be preexisting? can't you be preexisting? can't they be preexisting?
Perfect	V-ing perfect
can't I have preexisted? can't you have preexisted? can't he have preexisted? can't we have preexisted? can't you have preexisted? can't they have preexisted?	can't I have been preexisting? can't you have been preexisting? can't he have been preexisting? can't we have been preexisting? can't you have been preexisting? can't they have been preexisting?