can vanquish
Regular verb: vanquish - vanquished- vanquished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can vanquish
you can vanquish
he can vanquish
we can vanquish
you can vanquish
they can vanquish 	I can be vanquishing
you can be vanquishing
he can be vanquishing
we can be vanquishing
you can be vanquishing
they can be vanquishing	I can have vanquished
you can have vanquished
he can have vanquished
we can have vanquished
you can have vanquished
they can have vanquished	I can have been vanquishing
you can have been vanquishing
he can have been vanquishing
we can have been vanquishing
you can have been vanquishing
they can have been vanquishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't vanquish
you can't vanquish
he can't vanquish
we can't vanquish
you can't vanquish
they can't vanquish 	I can't be vanquishing
you can't be vanquishing
he can't be vanquishing
we can't be vanquishing
you can't be vanquishing
they can't be vanquishing	I can't have vanquished
you can't have vanquished
he can't have vanquished
we can't have vanquished
you can't have vanquished
they can't have vanquished	I can't have been vanquishing
you can't have been vanquishing
he can't have been vanquishing
we can't have been vanquishing
you can't have been vanquishing
they can't have been vanquishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I vanquish?
can you vanquish?
can he vanquish?
can we vanquish?
can you vanquish?
can they vanquish? 	can I be vanquishing?
can you be vanquishing?
can he be vanquishing?
can we be vanquishing?
can you be vanquishing?
can they be vanquishing? 	can I have vanquished?
can you have vanquished?
can he have vanquished?
can we have vanquished?
can you have vanquished?
can they have vanquished? 	can I have been vanquishing?
can you have been vanquishing?
can he have been vanquishing?
can we have been vanquishing?
can you have been vanquishing?
can they have been vanquishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I vanquish?
can't you vanquish?
can't he vanquish?
can't we vanquish?
can't you vanquish?
can't they vanquish? 	can't I be vanquishing?
can't you be vanquishing?
can't he be vanquishing?
can't we be vanquishing?
can't you be vanquishing?
can't they be vanquishing? 	can't I have vanquished?
can't you have vanquished?
can't he have vanquished?
can't we have vanquished?
can't you have vanquished?
can't they have vanquished? 	can't I have been vanquishing?
can't you have been vanquishing?
can't he have been vanquishing?
can't we have been vanquishing?
can't you have been vanquishing?
can't they have been vanquishing?