I can overcast you can overcast she can overcast we can overcast you can overcast they can overcast
V-ing form
I can be overcasting you can be overcasting she can be overcasting we can be overcasting you can be overcasting they can be overcasting
Perfect
I can have overcasted you can have overcasted she can have overcasted we can have overcasted you can have overcasted they can have overcasted
V-ing perfect
I can have been overcasting you can have been overcasting she can have been overcasting we can have been overcasting you can have been overcasting they can have been overcasting
Negation
Simple form
I cannot overcast you cannot overcast she cannot overcast we cannot overcast you cannot overcast they cannot overcast
V-ing form
I cannot be overcasting you cannot be overcasting she cannot be overcasting we cannot be overcasting you cannot be overcasting they cannot be overcasting
Perfect
I cannot have overcasted you cannot have overcasted she cannot have overcasted we cannot have overcasted you cannot have overcasted they cannot have overcasted
V-ing perfect
I cannot have been overcasting you cannot have been overcasting she cannot have been overcasting we cannot have been overcasting you cannot have been overcasting they cannot have been overcasting
Interrogative form
Simple form
can I overcast? can you overcast? can she overcast? can we overcast? can you overcast? can they overcast?
V-ing form
can I be overcasting? can you be overcasting? can she be overcasting? can we be overcasting? can you be overcasting? can they be overcasting?
Perfect
can I have overcasted? can you have overcasted? can she have overcasted? can we have overcasted? can you have overcasted? can they have overcasted?
V-ing perfect
can I have been overcasting? can you have been overcasting? can she have been overcasting? can we have been overcasting? can you have been overcasting? can they have been overcasting?
Interro-negative form
Simple form
can I not overcast? can you not overcast? can she not overcast? can we not overcast? can you not overcast? can they not overcast?
V-ing form
can I not be overcasting? can you not be overcasting? can she not be overcasting? can we not be overcasting? can you not be overcasting? can they not be overcasting?
Perfect
can I not have overcasted? can you not have overcasted? can she not have overcasted? can we not have overcasted? can you not have overcasted? can they not have overcasted?
V-ing perfect
can I not have been overcasting? can you not have been overcasting? can she not have been overcasting? can we not have been overcasting? can you not have been overcasting? can they not have been overcasting?