Choose the correct question in present perfect continuous. Study the example.

Example:

Correct: How long has John been learning English?

Incorrect: How long have John been learning English? (We use 'has' with 'he')

Incorrect: How long has Boris been learnning English? (We don't double the letter 'n' when adding -ing)

1.

• Has his brother been cooking dinner?
• Has his brother been cookking dinner?
• Have his brother been cooking dinner?

2.

• Have Billy been working?
• Has Billy been working?
• Has Billy been workking?

3.

• Have Richard been working in the garden?
• Has Richard been working in the garden?
• Has Richard worked in the garden?