127 Non-standard use of modals for politeness reasons

A - feature is pervasive or obligatory3
B - feature is neither pervasive nor extremely rare10
C - feature exists, but is extremely rare6
D - attested absence of feature37
X - feature is not applicable (given the structural make-up of the variety/P/C)9
? - no information on feature is available12

Feature area:
Verb phrase II: modal verbs
Typical example:
This furniture may be [‘is to be’] removed tomorrow; Must I make you some tea? ‘Shall I…’
Example source:
IndE (Bhatt 2008: 553); WhSAfE (Bowerman 2008: 477)
Variety World Region Type Value
Id Primary text Variety Variety Type