Fragen über die Beispielsätze mit, und die Definition und Benutzung von "Cman"

A: "Number" is singular.

One is the loneliest number.

A: Yes. You can because "number" is the subject, and "is" is the verb. The subject and verb need to agree, which they do. If students was the subject it would be different. e.g., "There is one student in my class / There are two students in my class"