Either would be fine.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
PreciousJonesA friend walks by me and I say hello to him. He then walks away. My mom asks:Who was that guy? or should it be:Who is that guy?Please correct.Are you sure?
PreciousJonesA friend walks by me and I say hello to him. He then walks away. My mom asks:Who was that guy? or should it be:Who is that guy?Please correct.The more natural question, to my ear, is, "Who was that guy?" (You mentioned that "He then walks away".) (It is not incorrect to say, "Who is that guy?". It's just not as natural to my ear.)