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