be + -ing > be + a- + -ing

sens / valeurs > prédiction, prédication, prophétie

My life's a shade, my days. My lips shall praise you.

My Lord, he is a-coming soon. My Lord, he is the fairest of the fair.

    http://www.oremus.org/hymnal/m/m.html

O, rise ! shine ! for thy light s a-coming

Rise! Shine! For thy light is a-coming

O, rise ! shine ! for thy light s a-coming

My Lord says He’s coming by an’ by

    RISE, SHINE, FOR THY LIGHT IS A-COMING,
    http://www.negrospirituals.com/news-song/rise_shine_for_thy_light_is_a_coming.htm

The “Locusts” (13-Year Periodical Cicadas) Are A-Coming!

    Highlights on agricultural research, headline, Volume 45 Number 1 Spring 1998, US site, http://www.ag.auburn.edu/aaes/communications/highlights/spring98/cicada.html

Good times are a'coming
 

All indications are that several years of good economic times

have returned to the cow-calf sector.

Feeder cattle prices,

driven by record-high slaughter prices and feedlot profits,

are also showing strength.

    Headline and first §, 1.10.2003, US site,
    http://beef-mag.com/mag/beef_good_times_acoming/

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