I'll be sustaining you'll be sustaining he'll be sustaining we'll be sustaining you'll be sustaining they'll be sustaining
Perfect
I'll have sustained you'll have sustained he'll have sustained we'll have sustained you'll have sustained they'll have sustained
V-ing perfect
I'll have been sustaining you'll have been sustaining he'll have been sustaining we'll have been sustaining you'll have been sustaining they'll have been sustaining
Negation
Simple form
I shan't sustain you shan't sustain he shan't sustain we shan't sustain you shan't sustain they shan't sustain
V-ing form
I shan't be sustaining you shan't be sustaining he shan't be sustaining we shan't be sustaining you shan't be sustaining they shan't be sustaining
Perfect
I shan't have sustained you shan't have sustained he shan't have sustained we shan't have sustained you shan't have sustained they shan't have sustained
V-ing perfect
I shan't have been sustaining you shan't have been sustaining he shan't have been sustaining we shan't have been sustaining you shan't have been sustaining they shan't have been sustaining
Interrogative form
Simple form
shall I sustain? shall you sustain? shall he sustain? shall we sustain? shall you sustain? shall they sustain?
V-ing form
shall I be sustaining? shall you be sustaining? shall he be sustaining? shall we be sustaining? shall you be sustaining? shall they be sustaining?
Perfect
shall I have sustained? shall you have sustained? shall he have sustained? shall we have sustained? shall you have sustained? shall they have sustained?
V-ing perfect
shall I have been sustaining? shall you have been sustaining? shall he have been sustaining? shall we have been sustaining? shall you have been sustaining? shall they have been sustaining?
Interro-negative form
Simple form
shan't I sustain? shan't you sustain? shan't he sustain? shan't we sustain? shan't you sustain? shan't they sustain?
V-ing form
shan't I be sustaining? shan't you be sustaining? shan't he be sustaining? shan't we be sustaining? shan't you be sustaining? shan't they be sustaining?
Perfect
shan't I have sustained? shan't you have sustained? shan't he have sustained? shan't we have sustained? shan't you have sustained? shan't they have sustained?
V-ing perfect
shan't I have been sustaining? shan't you have been sustaining? shan't he have been sustaining? shan't we have been sustaining? shan't you have been sustaining? shan't they have been sustaining?