can relapse
Regular verb: relapse - relapsed- relapsed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can relapse
you can relapse
she can relapse
we can relapse
you can relapse
they can relapse 	I can be relapsing
you can be relapsing
she can be relapsing
we can be relapsing
you can be relapsing
they can be relapsing	I can have relapsed
you can have relapsed
she can have relapsed
we can have relapsed
you can have relapsed
they can have relapsed	I can have been relapsing
you can have been relapsing
she can have been relapsing
we can have been relapsing
you can have been relapsing
they can have been relapsing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't relapse
you can't relapse
she can't relapse
we can't relapse
you can't relapse
they can't relapse 	I can't be relapsing
you can't be relapsing
she can't be relapsing
we can't be relapsing
you can't be relapsing
they can't be relapsing	I can't have relapsed
you can't have relapsed
she can't have relapsed
we can't have relapsed
you can't have relapsed
they can't have relapsed	I can't have been relapsing
you can't have been relapsing
she can't have been relapsing
we can't have been relapsing
you can't have been relapsing
they can't have been relapsing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I relapse?
can you relapse?
can she relapse?
can we relapse?
can you relapse?
can they relapse? 	can I be relapsing?
can you be relapsing?
can she be relapsing?
can we be relapsing?
can you be relapsing?
can they be relapsing? 	can I have relapsed?
can you have relapsed?
can she have relapsed?
can we have relapsed?
can you have relapsed?
can they have relapsed? 	can I have been relapsing?
can you have been relapsing?
can she have been relapsing?
can we have been relapsing?
can you have been relapsing?
can they have been relapsing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I relapse?
can't you relapse?
can't she relapse?
can't we relapse?
can't you relapse?
can't they relapse? 	can't I be relapsing?
can't you be relapsing?
can't she be relapsing?
can't we be relapsing?
can't you be relapsing?
can't they be relapsing? 	can't I have relapsed?
can't you have relapsed?
can't she have relapsed?
can't we have relapsed?
can't you have relapsed?
can't they have relapsed? 	can't I have been relapsing?
can't you have been relapsing?
can't she have been relapsing?
can't we have been relapsing?
can't you have been relapsing?
can't they have been relapsing?