Rezac (2008:26)

De Arbres
 The particle a is triggered by any préverbal nominal, regardless of whether it binds a resumptive or comes from any movement gap. Yet a préverbal DP that comes from a movement gap only triggers (a)zo if it is the narrow subject, and emañ, eo if it is a local object or a remote gap, (63) (cf. Hendrick 1988: 105-6 note 2). 
 
 Therefore the Leon dialect has the contrast in (64). 
 
 (64)a. A-bar extraction: DPi BE [… __i …]  
        →  eo/emañ copula / a particle
 
 (64)b. Broad subject: DPi BE [… pronouni …] 
        → (a) zo copula / a particle (Leon dialect, setting aside narrow subject)
 
 
 Preverbal DPs other than the narrow subject are differentiated by the copula according as they link to a gap or a resumptive, and the key to this difference is not in the particle, which neutralizes them.
 
 (63)a. Per EMAÑ / *A ZO Mona o klask __ er c'hoad.
 Per is /R is Mona PRG seek in.the wood
 'Mona is looking for Per in the woods.'    (Hendrick 1988: 105-6 note 2)
 
 (63)b. Per A ZO o klask Mona er c'hoad.
 Per R is PRG seek Mona in.the wood
 'Per is looking for Mona in the woods.'    (Hendrick 1988: 105-6 note 2)
 
 (63)c. Petra EMA en e zoñj [ober __] ?
 what is in his1 thought do.INF
 'What is he thinking of doing ?'            (Fave 1998:141 [Leon])
 

Référence

  • Rezac, Milan. 2011. Rezac, Milan. 2011. 'Building and interpreting a nonthematic A-position: A-resumption in English and Breton', Alain Rouveret (ed.), Resumptive pronouns at the interfaces, Language faculty and beyond, Benjamins. 241-286. (pdf de la version 2008)