The interrogative pronouns are more or less the same
like in English. And if we leave some minor insignificant
differences aside, the use is also the same. As we have
already seen more than once (the problems repeat themselves
as always in the history of mankind), e.g. in the chapter
of possessive
pronouns, there are two types of pronouns. Adjectival
pronouns and substantival
pronouns, which means that they can be used either
like an adjective or like a noun. And they have to be
declined. We have already said that Germans really love
to decline and if other people just love to sing and
dance and eat and drink, we Germans just love to decline
everything that comes in our way. Inevitably now
follows the declination of the interrogative pronouns.