You can also use the Present Perfect Continuous WITHOUT a duration such as “for two weeks.” Without the duration, the tense has a more general meaning of “lately.” We often use the words “lately” or “recently” to emphasize this meaning.

Examples:

  • Recently, I have been feeling really tired.
  • She has been watching too much television lately.
  • Have you been exercising lately?
  • Mary has been feeling a little depressed.
  • Lisa has not been practicing her English.
  • What have you been doing?