Multiple choice

The baby ........... all morning. He must be sick!

  1. have been crying

  2. has crying been

  3. has be crying

  4. has been crying
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The subject "The baby" is third-person singular, so it requires the auxiliary verb "has". The present perfect continuous tense is formed with "has/have been + verb-ing", making "has been crying" the correct option.

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