could relapse
Verbo regular: relapse - relapsed- relapsed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could relapse
you could relapse
he could relapse
we could relapse
you could relapse
they could relapse 	I could be relapsing
you could be relapsing
he could be relapsing
we could be relapsing
you could be relapsing
they could be relapsing	I could have relapsed
you could have relapsed
he could have relapsed
we could have relapsed
you could have relapsed
they could have relapsed	I could have been relapsing
you could have been relapsing
he could have been relapsing
we could have been relapsing
you could have been relapsing
they could have been relapsing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't relapse
you couldn't relapse
he couldn't relapse
we couldn't relapse
you couldn't relapse
they couldn't relapse 	I couldn't be relapsing
you couldn't be relapsing
he couldn't be relapsing
we couldn't be relapsing
you couldn't be relapsing
they couldn't be relapsing	I couldn't have relapsed
you couldn't have relapsed
he couldn't have relapsed
we couldn't have relapsed
you couldn't have relapsed
they couldn't have relapsed	I couldn't have been relapsing
you couldn't have been relapsing
he couldn't have been relapsing
we couldn't have been relapsing
you couldn't have been relapsing
they couldn't have been relapsing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I relapse?
could you relapse?
could he relapse?
could we relapse?
could you relapse?
could they relapse? 	could I be relapsing?
could you be relapsing?
could he be relapsing?
could we be relapsing?
could you be relapsing?
could they be relapsing? 	could I have relapsed?
could you have relapsed?
could he have relapsed?
could we have relapsed?
could you have relapsed?
could they have relapsed? 	could I have been relapsing?
could you have been relapsing?
could he have been relapsing?
could we have been relapsing?
could you have been relapsing?
could they have been relapsing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I relapse?
couldn't you relapse?
couldn't he relapse?
couldn't we relapse?
couldn't you relapse?
couldn't they relapse? 	couldn't I be relapsing?
couldn't you be relapsing?
couldn't he be relapsing?
couldn't we be relapsing?
couldn't you be relapsing?
couldn't they be relapsing? 	couldn't I have relapsed?
couldn't you have relapsed?
couldn't he have relapsed?
couldn't we have relapsed?
couldn't you have relapsed?
couldn't they have relapsed? 	couldn't I have been relapsing?
couldn't you have been relapsing?
couldn't he have been relapsing?
couldn't we have been relapsing?
couldn't you have been relapsing?
couldn't they have been relapsing?