Direct address can stand in sentence initial, medial and final positions. In sentence initial position it commonly forms an intonation group pronounced with the Low Fall in formal, serious speech and with the Fall-Rise in a friendly conversation or to attract the listener's attention, eg:
(Comrades, | Vswitch on the 'tape-recorders and 'listen to
the xtext. xMo,ther, | could I Vgo and 'play ;football now?
In sentence medial and final positions direct address frequently sounds as an unstressed or partially-stressed tail of the preceding intonation group, eg:
Good x morning, Mrs. .Wood.
Sometimes intonation groups with direct address in the middle or at the end are pronounced with the Fall-Rise, eg:
VShut the 'door bexhind you,,Peter.