en/ADV: PronType details (#517)

_en/pos/ADV.md

@@ -2,7 +2,42 @@
 layout: postag
 title: 'ADV'
 shortdef: 'adverb'
+udver: 2
 ---
 
-The English `ADV` covers all uses of PTB tags RB, RBR, RBS, and WRB except the clausal negation _not_ and reduced forms of it, which become [PART]().
+The English `ADV` tag covers all uses of PTB tags RB, RBR, RBS, and WRB except the clausal negation _not_ and reduced forms of it, which become [PART]().
+It also covers the abbreviations "i.e." and "e.g.", which PTB tags as FW.
+
+## ADVs with `PronType`
+
+Pro-forms tagged as `ADV` receive a [PronType]() feature. Such items are listed in the tables below.
+
+WH Lemma | `PronType`
+------|-----------
+_how_, _why_ | `PronType=Int` or `PronType=Rel`
+_when_, _where_, _whither_ | `PronType=Dem` or `PronType=Int` or `PronType=Rel`
+_whenever_, _wherever_ | `PronType=Dem` or `PronType=Rel`
+_wherein_ | `PronType=Rel`
+
+[PronType]()=`Rel` applies when these trigger a relative construction—see [acl:relcl]() for details.
+When they are interrogative, they receive `PronType=Int`. When they simply help specify a place or time, they are `PronType=Dem`.
+For example:
+
+WH Lemma | `PronType=Dem` | `PronType=Int` | `PronType=Rel`
+---------|----------------|----------------|---------------
+_when_   | _<b>When</b> the clock struck twelve, the spell wore off._ | _<b>When</b> did the spell wear off?_ | _the moment <b>when</b> the clock strikes twelve_
+
+Non-WH lemmas are less ambiguous:
+
+Non-WH Lemma | `PronType`
+-------------|-----------
+_here_, _now_, _then_, _there_ | `PronType=Dem`
+_neither_, _never_, _nowhere_ | `PronType=Neg`
+_always_, _everywhere_ | `PronType=Tot`
+_anyplace_, _anytime_, _anywhere_ | `PronType=Ind`
+_someplace_, _sometime(s)_, _somewhere_ | `PronType=Ind`
+_ever_, _either_ | `PronType=Ind`
+
+See also: [PRON](), [DET]()
+
 <!-- Interlanguage links updated Ne 5. května 2024, 18:19:33 CEST -->