can bolster
Regular verb: bolster - bolstered- bolstered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can bolster
you can bolster
she can bolster
we can bolster
you can bolster
they can bolster 	I can be bolstering
you can be bolstering
she can be bolstering
we can be bolstering
you can be bolstering
they can be bolstering	I can have bolstered
you can have bolstered
she can have bolstered
we can have bolstered
you can have bolstered
they can have bolstered	I can have been bolstering
you can have been bolstering
she can have been bolstering
we can have been bolstering
you can have been bolstering
they can have been bolstering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't bolster
you can't bolster
she can't bolster
we can't bolster
you can't bolster
they can't bolster 	I can't be bolstering
you can't be bolstering
she can't be bolstering
we can't be bolstering
you can't be bolstering
they can't be bolstering	I can't have bolstered
you can't have bolstered
she can't have bolstered
we can't have bolstered
you can't have bolstered
they can't have bolstered	I can't have been bolstering
you can't have been bolstering
she can't have been bolstering
we can't have been bolstering
you can't have been bolstering
they can't have been bolstering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I bolster?
can you bolster?
can she bolster?
can we bolster?
can you bolster?
can they bolster? 	can I be bolstering?
can you be bolstering?
can she be bolstering?
can we be bolstering?
can you be bolstering?
can they be bolstering? 	can I have bolstered?
can you have bolstered?
can she have bolstered?
can we have bolstered?
can you have bolstered?
can they have bolstered? 	can I have been bolstering?
can you have been bolstering?
can she have been bolstering?
can we have been bolstering?
can you have been bolstering?
can they have been bolstering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I bolster?
can't you bolster?
can't she bolster?
can't we bolster?
can't you bolster?
can't they bolster? 	can't I be bolstering?
can't you be bolstering?
can't she be bolstering?
can't we be bolstering?
can't you be bolstering?
can't they be bolstering? 	can't I have bolstered?
can't you have bolstered?
can't she have bolstered?
can't we have bolstered?
can't you have bolstered?
can't they have bolstered? 	can't I have been bolstering?
can't you have been bolstering?
can't she have been bolstering?
can't we have been bolstering?
can't you have been bolstering?
can't they have been bolstering?