I can waste you can waste he can waste we can waste you can waste they can waste
V-ing form
I can be wasting you can be wasting he can be wasting we can be wasting you can be wasting they can be wasting
Perfect
I can have wasted you can have wasted he can have wasted we can have wasted you can have wasted they can have wasted
V-ing perfect
I can have been wasting you can have been wasting he can have been wasting we can have been wasting you can have been wasting they can have been wasting
Negation
Simple form
I cannot waste you cannot waste he cannot waste we cannot waste you cannot waste they cannot waste
V-ing form
I cannot be wasting you cannot be wasting he cannot be wasting we cannot be wasting you cannot be wasting they cannot be wasting
Perfect
I cannot have wasted you cannot have wasted he cannot have wasted we cannot have wasted you cannot have wasted they cannot have wasted
V-ing perfect
I cannot have been wasting you cannot have been wasting he cannot have been wasting we cannot have been wasting you cannot have been wasting they cannot have been wasting
Interrogative form
Simple form
can I waste? can you waste? can he waste? can we waste? can you waste? can they waste?
V-ing form
can I be wasting? can you be wasting? can he be wasting? can we be wasting? can you be wasting? can they be wasting?
Perfect
can I have wasted? can you have wasted? can he have wasted? can we have wasted? can you have wasted? can they have wasted?
V-ing perfect
can I have been wasting? can you have been wasting? can he have been wasting? can we have been wasting? can you have been wasting? can they have been wasting?
Interro-negative form
Simple form
can I not waste? can you not waste? can he not waste? can we not waste? can you not waste? can they not waste?
V-ing form
can I not be wasting? can you not be wasting? can he not be wasting? can we not be wasting? can you not be wasting? can they not be wasting?
Perfect
can I not have wasted? can you not have wasted? can he not have wasted? can we not have wasted? can you not have wasted? can they not have wasted?
V-ing perfect
can I not have been wasting? can you not have been wasting? can he not have been wasting? can we not have been wasting? can you not have been wasting? can they not have been wasting?