I'll be overcasting you'll be overcasting she'll be overcasting we'll be overcasting you'll be overcasting they'll be overcasting
Perfect
I'll have overcasted you'll have overcasted she'll have overcasted we'll have overcasted you'll have overcasted they'll have overcasted
V-ing perfect
I'll have been overcasting you'll have been overcasting she'll have been overcasting we'll have been overcasting you'll have been overcasting they'll have been overcasting
Negation
Simple form
I shan't overcast you shan't overcast she shan't overcast we shan't overcast you shan't overcast they shan't overcast
V-ing form
I shan't be overcasting you shan't be overcasting she shan't be overcasting we shan't be overcasting you shan't be overcasting they shan't be overcasting
Perfect
I shan't have overcasted you shan't have overcasted she shan't have overcasted we shan't have overcasted you shan't have overcasted they shan't have overcasted
V-ing perfect
I shan't have been overcasting you shan't have been overcasting she shan't have been overcasting we shan't have been overcasting you shan't have been overcasting they shan't have been overcasting
Interrogative form
Simple form
shall I overcast? shall you overcast? shall she overcast? shall we overcast? shall you overcast? shall they overcast?
V-ing form
shall I be overcasting? shall you be overcasting? shall she be overcasting? shall we be overcasting? shall you be overcasting? shall they be overcasting?
Perfect
shall I have overcasted? shall you have overcasted? shall she have overcasted? shall we have overcasted? shall you have overcasted? shall they have overcasted?
V-ing perfect
shall I have been overcasting? shall you have been overcasting? shall she have been overcasting? shall we have been overcasting? shall you have been overcasting? shall they have been overcasting?
Interro-negative form
Simple form
shan't I overcast? shan't you overcast? shan't she overcast? shan't we overcast? shan't you overcast? shan't they overcast?
V-ing form
shan't I be overcasting? shan't you be overcasting? shan't she be overcasting? shan't we be overcasting? shan't you be overcasting? shan't they be overcasting?
Perfect
shan't I have overcasted? shan't you have overcasted? shan't she have overcasted? shan't we have overcasted? shan't you have overcasted? shan't they have overcasted?
V-ing perfect
shan't I have been overcasting? shan't you have been overcasting? shan't she have been overcasting? shan't we have been overcasting? shan't you have been overcasting? shan't they have been overcasting?