I can roam you can roam she can roam we can roam you can roam they can roam
V-ing form
I can be roaming you can be roaming she can be roaming we can be roaming you can be roaming they can be roaming
Perfect
I can have roamed you can have roamed she can have roamed we can have roamed you can have roamed they can have roamed
V-ing perfect
I can have been roaming you can have been roaming she can have been roaming we can have been roaming you can have been roaming they can have been roaming
Negation
Simple form
I cannot roam you cannot roam she cannot roam we cannot roam you cannot roam they cannot roam
V-ing form
I cannot be roaming you cannot be roaming she cannot be roaming we cannot be roaming you cannot be roaming they cannot be roaming
Perfect
I cannot have roamed you cannot have roamed she cannot have roamed we cannot have roamed you cannot have roamed they cannot have roamed
V-ing perfect
I cannot have been roaming you cannot have been roaming she cannot have been roaming we cannot have been roaming you cannot have been roaming they cannot have been roaming
Interrogative form
Simple form
can I roam? can you roam? can she roam? can we roam? can you roam? can they roam?
V-ing form
can I be roaming? can you be roaming? can she be roaming? can we be roaming? can you be roaming? can they be roaming?
Perfect
can I have roamed? can you have roamed? can she have roamed? can we have roamed? can you have roamed? can they have roamed?
V-ing perfect
can I have been roaming? can you have been roaming? can she have been roaming? can we have been roaming? can you have been roaming? can they have been roaming?
Interro-negative form
Simple form
can I not roam? can you not roam? can she not roam? can we not roam? can you not roam? can they not roam?
V-ing form
can I not be roaming? can you not be roaming? can she not be roaming? can we not be roaming? can you not be roaming? can they not be roaming?
Perfect
can I not have roamed? can you not have roamed? can she not have roamed? can we not have roamed? can you not have roamed? can they not have roamed?
V-ing perfect
can I not have been roaming? can you not have been roaming? can she not have been roaming? can we not have been roaming? can you not have been roaming? can they not have been roaming?