The question form of the sentence using the present continuous tense of the infinitive buy will be
Am I buying some new clothes at the moment?
Or
Are you buying some new clothes at the moment?
In the field of English grammar, present continuous tense can be described as a tense which represents an ongoing action. It shows actions that are occurring now.
A sentence can be written in the present continuous tense using the formula is/am/are+ present participle (ing).
Hence, the infinitive 'buy' will be changed into 'buying' when the sentence is changed into the present continuous tense.
A question form is an interrogative form of a sentence. A question form always ends with a question mark. When changing the above sentence into question form, question mark will be placed instead of the full stop.
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