Adverbial groups
Adverbial group heads used to post-modify nouns express notions such as space, time and reason. In many cases they may be analyzed as ellipted adverbial groups or clauses:
place: Is this the way out?
time: He came, and left the week after.
reason: She fell out with her sister, but I never knew why.
Relative adverbial clauses as post-modifiers
The relative adverbs where, when and why introduce clauses which post-modify nouns denoting places, times or reasons. Where and when have corresponding supplementive uses.
The relative adverbs when and why, but rarely where, can be replaced by that or zero in restrictive clauses:
In the week (that) the exams take place . . . The reason (that) I ask you . . .
The town where I was born but not *The town that I was born.
Zero is also common after the head noun way:
That’s not the way (0) we do it here.
