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