I can found you can found she can found we can found you can found they can found
V-ing form
I can be founding you can be founding she can be founding we can be founding you can be founding they can be founding
Perfect
I can have founded you can have founded she can have founded we can have founded you can have founded they can have founded
V-ing perfect
I can have been founding you can have been founding she can have been founding we can have been founding you can have been founding they can have been founding
Negation
Simple form
I cannot found you cannot found she cannot found we cannot found you cannot found they cannot found
V-ing form
I cannot be founding you cannot be founding she cannot be founding we cannot be founding you cannot be founding they cannot be founding
Perfect
I cannot have founded you cannot have founded she cannot have founded we cannot have founded you cannot have founded they cannot have founded
V-ing perfect
I cannot have been founding you cannot have been founding she cannot have been founding we cannot have been founding you cannot have been founding they cannot have been founding
Interrogative form
Simple form
can I found? can you found? can she found? can we found? can you found? can they found?
V-ing form
can I be founding? can you be founding? can she be founding? can we be founding? can you be founding? can they be founding?
Perfect
can I have founded? can you have founded? can she have founded? can we have founded? can you have founded? can they have founded?
V-ing perfect
can I have been founding? can you have been founding? can she have been founding? can we have been founding? can you have been founding? can they have been founding?
Interro-negative form
Simple form
can I not found? can you not found? can she not found? can we not found? can you not found? can they not found?
V-ing form
can I not be founding? can you not be founding? can she not be founding? can we not be founding? can you not be founding? can they not be founding?
Perfect
can I not have founded? can you not have founded? can she not have founded? can we not have founded? can you not have founded? can they not have founded?
V-ing perfect
can I not have been founding? can you not have been founding? can she not have been founding? can we not have been founding? can you not have been founding? can they not have been founding?