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