I

Pronoun

  have

Auxiliary

  been

Auxiliary

  waiting

Verb

  for you

  here

Adverb

  at

Adposition

  this

Determiner

  oasis

Noun

  for

Adposition

  a

Determiner

  long time

.

I have been waiting for you here at this oasis for a long time.

I have been waiting for you here at this oasis for a long time.