I could perjure you could perjure she could perjure we could perjure you could perjure they could perjure
V-ing form
I could be perjuring you could be perjuring she could be perjuring we could be perjuring you could be perjuring they could be perjuring
Perfect
I could have perjured you could have perjured she could have perjured we could have perjured you could have perjured they could have perjured
V-ing perfect
I could have been perjuring you could have been perjuring she could have been perjuring we could have been perjuring you could have been perjuring they could have been perjuring
Negation
Simple form
I couldn't perjure you couldn't perjure she couldn't perjure we couldn't perjure you couldn't perjure they couldn't perjure
V-ing form
I couldn't be perjuring you couldn't be perjuring she couldn't be perjuring we couldn't be perjuring you couldn't be perjuring they couldn't be perjuring
Perfect
I couldn't have perjured you couldn't have perjured she couldn't have perjured we couldn't have perjured you couldn't have perjured they couldn't have perjured
V-ing perfect
I couldn't have been perjuring you couldn't have been perjuring she couldn't have been perjuring we couldn't have been perjuring you couldn't have been perjuring they couldn't have been perjuring
Interrogative form
Simple form
could I perjure? could you perjure? could she perjure? could we perjure? could you perjure? could they perjure?
V-ing form
could I be perjuring? could you be perjuring? could she be perjuring? could we be perjuring? could you be perjuring? could they be perjuring?
Perfect
could I have perjured? could you have perjured? could she have perjured? could we have perjured? could you have perjured? could they have perjured?
V-ing perfect
could I have been perjuring? could you have been perjuring? could she have been perjuring? could we have been perjuring? could you have been perjuring? could they have been perjuring?
Interro-negative form
Simple form
couldn't I perjure? couldn't you perjure? couldn't she perjure? couldn't we perjure? couldn't you perjure? couldn't they perjure?
V-ing form
couldn't I be perjuring? couldn't you be perjuring? couldn't she be perjuring? couldn't we be perjuring? couldn't you be perjuring? couldn't they be perjuring?
Perfect
couldn't I have perjured? couldn't you have perjured? couldn't she have perjured? couldn't we have perjured? couldn't you have perjured? couldn't they have perjured?
V-ing perfect
couldn't I have been perjuring? couldn't you have been perjuring? couldn't she have been perjuring? couldn't we have been perjuring? couldn't you have been perjuring? couldn't they have been perjuring?