Question

Choose the most appropriate option to fill in the blank:

You look tired. _________________ (you/work) too hard?

• A. Will you be working
• B. Have you worked
• C. Have you been working
  
• D. Did you work

Answer 1

The correct option is C Have you been working

The present perfect continuous tense (also known as the present perfect progressive tense) shows that something started in the past and is continuing at the present time. Here the action of working is continuing to the present. The present perfect continuous is formed using the construction has/have been + the present participle (root verb + -ing). Hence, Option C is correct.

The rest of the options either indicate that the action has already happened (Options B and D) or that the action will happen in distant and indefinite future (Option A), hence they're incorrect.