Anonymous Is this natural sentence No. — He was probably having dinner when he took the call, judging by the culinary sounds.
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Anonymous Is this natural sentenceNo. Is this what you mean?—
Anonymous. I thought the past form of 'must' is 'should'. Not?No. 'Must' => 'must have'.
AnonymousDo you think this one also sound native? Or should I use your first answer?Yes, that what is fine, too. Either might occur.