Who was the name of a rock group from the sixties and seventies that included Roger Daltry and Pete Townsend. Or should it be: Who was the name of a rock group from the sixties and seventies who included Roger Daltry and Pete Townsend? When do you use who and when do you use that?
The rule is easy to remember. Who is a human being (or beings). Use who when referring to people and that when referring to animals or objects. Here are some examples:
The man who would be king
The little boy who cried wolf
The lion that roared
The horse that won the race
The author who wrote the novel
Cheri, who never cared much for dogs, now has a poodle she loves.
As always, there are exceptions in usage. Some grammarians accept that for human beings when the reference is general rather than specific, such as: I can’t stand women that never need to diet. Most agree, however, that it’s preferable to say: I can’t stand women who never need to diet.
Also, who is often used in referring to animals that are treated as personalities. It’s safe to go with the rule that who is used to refer to people, and that refers to everything else. But what about the Who? Is rock group a human being or a thing? Although rock groups, with a few exceptions, are made up of human beings, group is a thing. Therefore Grammar Cop says, The Who was the name of a rock group from the sixties and seventies that included Roger Daltry and Pete Townsend.
Bonus tip: The objective form for who is whom and should be used as illustrated in the following examples:
To whom it may concern, your company’s product is defective.
The memo should be read only by the party to whom it’s addressed.
The wedding dress fit perfectly since the original bride, for whom it was designed, was the same build and size.
To whom should I address my question?