I can threat you can threat he can threat we can threat you can threat they can threat
V-ing form
I can be threating you can be threating he can be threating we can be threating you can be threating they can be threating
Perfect
I can have threated you can have threated he can have threated we can have threated you can have threated they can have threated
V-ing perfect
I can have been threating you can have been threating he can have been threating we can have been threating you can have been threating they can have been threating
Negation
Simple form
I can't threat you can't threat he can't threat we can't threat you can't threat they can't threat
V-ing form
I can't be threating you can't be threating he can't be threating we can't be threating you can't be threating they can't be threating
Perfect
I can't have threated you can't have threated he can't have threated we can't have threated you can't have threated they can't have threated
V-ing perfect
I can't have been threating you can't have been threating he can't have been threating we can't have been threating you can't have been threating they can't have been threating
Interrogative form
Simple form
can I threat? can you threat? can he threat? can we threat? can you threat? can they threat?
V-ing form
can I be threating? can you be threating? can he be threating? can we be threating? can you be threating? can they be threating?
Perfect
can I have threated? can you have threated? can he have threated? can we have threated? can you have threated? can they have threated?
V-ing perfect
can I have been threating? can you have been threating? can he have been threating? can we have been threating? can you have been threating? can they have been threating?
Interro-negative form
Simple form
can't I threat? can't you threat? can't he threat? can't we threat? can't you threat? can't they threat?
V-ing form
can't I be threating? can't you be threating? can't he be threating? can't we be threating? can't you be threating? can't they be threating?
Perfect
can't I have threated? can't you have threated? can't he have threated? can't we have threated? can't you have threated? can't they have threated?
V-ing perfect
can't I have been threating? can't you have been threating? can't he have been threating? can't we have been threating? can't you have been threating? can't they have been threating?