I must nest you must nest he must nest we must nest you must nest they must nest
V-ing form
I must be nesting you must be nesting he must be nesting we must be nesting you must be nesting they must be nesting
Perfect
I must have nested you must have nested he must have nested we must have nested you must have nested they must have nested
V-ing perfect
I must have been nesting you must have been nesting he must have been nesting we must have been nesting you must have been nesting they must have been nesting
Negation
Simple form
I must not nest you must not nest he must not nest we must not nest you must not nest they must not nest
V-ing form
I must not be nesting you must not be nesting he must not be nesting we must not be nesting you must not be nesting they must not be nesting
Perfect
I must not have nested you must not have nested he must not have nested we must not have nested you must not have nested they must not have nested
V-ing perfect
I must not have been nesting you must not have been nesting he must not have been nesting we must not have been nesting you must not have been nesting they must not have been nesting
Interrogative form
Simple form
must I nest? must you nest? must he nest? must we nest? must you nest? must they nest?
V-ing form
must I be nesting? must you be nesting? must he be nesting? must we be nesting? must you be nesting? must they be nesting?
Perfect
must I have nested? must you have nested? must he have nested? must we have nested? must you have nested? must they have nested?
V-ing perfect
must I have been nesting? must you have been nesting? must he have been nesting? must we have been nesting? must you have been nesting? must they have been nesting?
Interro-negative form
Simple form
must I not nest? must you not nest? must he not nest? must we not nest? must you not nest? must they not nest?
V-ing form
must I not be nesting? must you not be nesting? must he not be nesting? must we not be nesting? must you not be nesting? must they not be nesting?
Perfect
must I not have nested? must you not have nested? must he not have nested? must we not have nested? must you not have nested? must they not have nested?
V-ing perfect
must I not have been nesting? must you not have been nesting? must he not have been nesting? must we not have been nesting? must you not have been nesting? must they not have been nesting?