Choose the correct question in present perfect continuous.
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)
![Shutterstock_492729481.jpg](https://resources.cdn.uzdevumi.lv/e0070dfb-5b98-4588-be85-dc1855949ad4/Shutterstock492729481w300.jpg)
1.
2.
3.
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