Many Pronouns, Pronominal Adjectives, and Adverbs have corresponding demonstrative, relative, interrogative, and indefinite forms. Such parallel forms are called Correlatives. They are shown in the following table:--

DEMON.	REL.	INTERROG.	INDEF. REL.	INDEF.
tantus -a -um	quantus -a -um	quantus -a -um?	quantus -a -umcumque	aliquantus -a -um
so great	how (as) great	how great?	however great	some
talis -is -e	qualis -is -e	qualis -is -e?	qualis -is -ecumque	----
such	as	of what sort?	of whatever kind
ibi (indecl.)	ubi (indecl.)	ubi (indecl.)?	ubiubi (indecl.)	alicubi (indecl.)
there	where	where?	wherever	somewhere
eo (indecl.)	quo (indecl.)	quo (indecl.)?	quoquo (indecl.)	aliquo (indecl.)
thither	whither	whither?	whithersoever	(to) somewhere
ea (indecl.)	qua (indecl.)	qua (indecl.)?	quaqua (indecl.)	aliqua (indecl.)
that way	which way	which way?	whithersoever	somewhere
inde (indecl.)	unde (indecl.)	unde (indecl.)?	undecumque (indecl.)	alicunde (indecl.)
thence	whence	whence?	whencesoever	from somewhere
tum (indecl.)	cum (indecl.)	quando (indecl.)?	quandocumque (indecl.)	aliquando (indecl.)
then	when	when?	whenever	at some time
tot (indecl.)	quot (indecl.)	quot (indecl.)?	quotquot (indecl.)	aliquot (indecl.)
so many	as	how many?	however many	some, several
totiens (indecl.)	quotiens (indecl.)	quotiens (indecl.)?	quotienscumque (indecl.)	aliquotiens (indecl.)
so often	as	how often?	however often	at several times