diff --git a/lib/resource/bulgarian/SentenceBul.gf b/lib/resource/bulgarian/SentenceBul.gf
index 7d6911958..d1a2626f6 100644
--- a/lib/resource/bulgarian/SentenceBul.gf
+++ b/lib/resource/bulgarian/SentenceBul.gf
@@ -17,6 +17,13 @@ concrete SentenceBul of Sentence = CatBul ** open Prelude, ResBul in {
     SlashV2 np v2 = 
       mkClause (np.s ! Nom) np.a (predV v2) ** {c2 = v2.c2} ;
 
+    AdvSlash slash adv = {
+      s  = \\t,a,b,o => slash.s ! t ! a ! b ! o ++ adv.s ;
+      c2 = slash.c2
+    } ;
+
+    SlashPrep cl prep = cl ** {c2 = prep.s} ;
+
     EmbedS  s  = {s = "," ++ "χε" ++ s.s} ;
     EmbedQS qs = {s = qs.s ! QIndir} ;
 
@@ -26,4 +33,8 @@ concrete SentenceBul of Sentence = CatBul ** open Prelude, ResBul in {
     UseQCl t a p cl = {
       s = \\q => t.s ++ a.s ++ p.s ++ cl.s ! t.t ! a.a ! p.p ! q
     } ;
+    UseSlash t a p cl = {
+      s = t.s ++ a.s ++ p.s ++ cl.s ! t.t ! a.a ! p.p ! Main ;
+      c2 = cl.c2
+    } ;
 }
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