I can clip you can clip he can clip we can clip you can clip they can clip
V-ing form
I can be clipping you can be clipping he can be clipping we can be clipping you can be clipping they can be clipping
Perfect
I can have clipped you can have clipped he can have clipped we can have clipped you can have clipped they can have clipped
V-ing perfect
I can have been clipping you can have been clipping he can have been clipping we can have been clipping you can have been clipping they can have been clipping
Negation
Simple form
I cannot clip you cannot clip he cannot clip we cannot clip you cannot clip they cannot clip
V-ing form
I cannot be clipping you cannot be clipping he cannot be clipping we cannot be clipping you cannot be clipping they cannot be clipping
Perfect
I cannot have clipped you cannot have clipped he cannot have clipped we cannot have clipped you cannot have clipped they cannot have clipped
V-ing perfect
I cannot have been clipping you cannot have been clipping he cannot have been clipping we cannot have been clipping you cannot have been clipping they cannot have been clipping
Interrogative form
Simple form
can I clip? can you clip? can he clip? can we clip? can you clip? can they clip?
V-ing form
can I be clipping? can you be clipping? can he be clipping? can we be clipping? can you be clipping? can they be clipping?
Perfect
can I have clipped? can you have clipped? can he have clipped? can we have clipped? can you have clipped? can they have clipped?
V-ing perfect
can I have been clipping? can you have been clipping? can he have been clipping? can we have been clipping? can you have been clipping? can they have been clipping?
Interro-negative form
Simple form
can I not clip? can you not clip? can he not clip? can we not clip? can you not clip? can they not clip?
V-ing form
can I not be clipping? can you not be clipping? can he not be clipping? can we not be clipping? can you not be clipping? can they not be clipping?
Perfect
can I not have clipped? can you not have clipped? can he not have clipped? can we not have clipped? can you not have clipped? can they not have clipped?
V-ing perfect
can I not have been clipping? can you not have been clipping? can he not have been clipping? can we not have been clipping? can you not have been clipping? can they not have been clipping?