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