Convert the given statement into a yes/no question: (Ensure that the meaning of the sentence remains unchanged.) Mary has been studying all night.
A
Has Mary been studying all night?
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B
Will Mary be studying all night?
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C
How long has Mary been studying?
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D
Does Mary study all night?
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Solution
The correct option is B Has Mary been studying all night? 'Yes/No' questions are those questions which start from helping verbs like was, are, were, is, etc.
In such a case, the order is Verb + Subject + Object. In the given sentence, 'Has' is the verb, 'Mary' is the subject and 'all night' is the object.