I could waive you could waive he could waive we could waive you could waive they could waive
V-ing form
I could be waiving you could be waiving he could be waiving we could be waiving you could be waiving they could be waiving
Perfect
I could have waived you could have waived he could have waived we could have waived you could have waived they could have waived
V-ing perfect
I could have been waiving you could have been waiving he could have been waiving we could have been waiving you could have been waiving they could have been waiving
Negation
Simple form
I couldn't waive you couldn't waive he couldn't waive we couldn't waive you couldn't waive they couldn't waive
V-ing form
I couldn't be waiving you couldn't be waiving he couldn't be waiving we couldn't be waiving you couldn't be waiving they couldn't be waiving
Perfect
I couldn't have waived you couldn't have waived he couldn't have waived we couldn't have waived you couldn't have waived they couldn't have waived
V-ing perfect
I couldn't have been waiving you couldn't have been waiving he couldn't have been waiving we couldn't have been waiving you couldn't have been waiving they couldn't have been waiving
Interrogative form
Simple form
could I waive? could you waive? could he waive? could we waive? could you waive? could they waive?
V-ing form
could I be waiving? could you be waiving? could he be waiving? could we be waiving? could you be waiving? could they be waiving?
Perfect
could I have waived? could you have waived? could he have waived? could we have waived? could you have waived? could they have waived?
V-ing perfect
could I have been waiving? could you have been waiving? could he have been waiving? could we have been waiving? could you have been waiving? could they have been waiving?
Interro-negative form
Simple form
couldn't I waive? couldn't you waive? couldn't he waive? couldn't we waive? couldn't you waive? couldn't they waive?
V-ing form
couldn't I be waiving? couldn't you be waiving? couldn't he be waiving? couldn't we be waiving? couldn't you be waiving? couldn't they be waiving?
Perfect
couldn't I have waived? couldn't you have waived? couldn't he have waived? couldn't we have waived? couldn't you have waived? couldn't they have waived?
V-ing perfect
couldn't I have been waiving? couldn't you have been waiving? couldn't he have been waiving? couldn't we have been waiving? couldn't you have been waiving? couldn't they have been waiving?