diff --git a/syntax/maude.vim b/syntax/maude.vim
index da166b1..8d4b432 100644
--- a/syntax/maude.vim
+++ b/syntax/maude.vim
@@ -69,6 +69,24 @@ hi def link maudePunc Operator
 syn match maudeDelim '[{}\[\](),]\|\%(^\|\s\)\zs\.\ze\%(\s\|$\)'
 hi def link maudeDelim Delimiter
 
+syn match maudeString /"\%([^"\\]\|\\.\)*"/ contains=maudeStringEsc
+hi def link maudeString String
+
+syn match maudeStringEsc /\\./ contained
+hi def link maudeStringEsc SpecialChar
+
+syn match maudeIdEsc /`[\[\]{}()]\?/
+hi def link maudeIdEsc SpecialChar
+
+syn match maudeQid /''\?\S\+/
+syn match maudeQid /'"\%([^"\\]\|\\.\)*"/ contains=maudeStringEsc
+hi def link maudeQid Constant
+
+syn match maudeNum !-\?\d\+\%(/\d\+\)\?!
+syn match maudeNum /-\?\d\+\.\d\+\%([Ee][+-]\?\d\+\)\?/
+syn keyword maudeNum Infinity -Infinity
+hi def link maudeNum Number
+
 
 syn keyword maudeCommand load set quit
 hi def link maudeCommand Special