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