I can secrete you can secrete he can secrete we can secrete you can secrete they can secrete
V-ing form
I can be secreting you can be secreting he can be secreting we can be secreting you can be secreting they can be secreting
Perfect
I can have secreted you can have secreted he can have secreted we can have secreted you can have secreted they can have secreted
V-ing perfect
I can have been secreting you can have been secreting he can have been secreting we can have been secreting you can have been secreting they can have been secreting
Negation
Simple form
I can't secrete you can't secrete he can't secrete we can't secrete you can't secrete they can't secrete
V-ing form
I can't be secreting you can't be secreting he can't be secreting we can't be secreting you can't be secreting they can't be secreting
Perfect
I can't have secreted you can't have secreted he can't have secreted we can't have secreted you can't have secreted they can't have secreted
V-ing perfect
I can't have been secreting you can't have been secreting he can't have been secreting we can't have been secreting you can't have been secreting they can't have been secreting
Interrogative form
Simple form
can I secrete? can you secrete? can he secrete? can we secrete? can you secrete? can they secrete?
V-ing form
can I be secreting? can you be secreting? can he be secreting? can we be secreting? can you be secreting? can they be secreting?
Perfect
can I have secreted? can you have secreted? can he have secreted? can we have secreted? can you have secreted? can they have secreted?
V-ing perfect
can I have been secreting? can you have been secreting? can he have been secreting? can we have been secreting? can you have been secreting? can they have been secreting?
Interro-negative form
Simple form
can't I secrete? can't you secrete? can't he secrete? can't we secrete? can't you secrete? can't they secrete?
V-ing form
can't I be secreting? can't you be secreting? can't he be secreting? can't we be secreting? can't you be secreting? can't they be secreting?
Perfect
can't I have secreted? can't you have secreted? can't he have secreted? can't we have secreted? can't you have secreted? can't they have secreted?
V-ing perfect
can't I have been secreting? can't you have been secreting? can't he have been secreting? can't we have been secreting? can't you have been secreting? can't they have been secreting?