Turkish: A Comprehensive Grammar

(ii) The degree to which a particular adjective or adverb is applicable:
(75) Yeni bürosü acaba ne kadar büyük?
‘How big, I wonder, is his/her new office?’
(76) Bu araba ne kadar hızlı gider?
‘How fast does this car go?’
(iii) The price of an item:
(77) Bu elbise ne kadar?
‘How much is this dress?’
Turkish: A comprehensive grammar 264
(iv) The quantity of time or space involved in a particular action, in which case it is used
adverbially:
(78) Bu sabah ne kadar koştun?
‘How long/how much did you run this morning?’
(79) Ameliyat ne kadar sürecek?
‘How long will the operation last?’
ne kadar is usually used with zaman ‘time’ as the complement of temporal postpositions
such as içinde/ zarfinda ‘within’, önce ‘before’ and sonra ‘after’ (16.4.1), when
inquiring about the amount of time associated with a particular event:
(80) Yemeğin altını, kaynadıktan ne kadar (zaman) sonra kapatıyorsunuz?
‘How long after the food comes to the boil do you turn off the heat?’
(81) Ne kadar (zaman)dır Londra’da oturuyorsunuz?
‘How long have you been living in London?’
With the addition of a 3rd person possessive suffix, the pronominalized form ne kadarı
(18.4 (iv)) can be used with a genitive-marked modifier (14.5.3):
(82) İş-in ne kadar-ın-ı Zeynep’e bırakacaksın?
job-GEN how.much-3SG.POSS-ACC
‘How much of the job will you leave to Zeynep?’
Sentences with ne kadar can also be used as exclamations (12.4 (iv)).
19.2.1.7 ne zaman ‘when’
ne zaman is used for questioning the time of an event.
(83) Ne zaman eve gidiyorsun?
‘When are you going home?’
It also occurs in postpositional phrases where the complement is a time expression:
(84) Ne zamandan beri sigara içiyorsun?
‘Since when have you been smoking?’
(85) Ne zamana kadar bekleyeyim?