[译] 她平时很少迟到。
[误] She is rare to come late at ordinary times.

[正] It is rare for her to come late at ordinary times.
[注] rare 表示"不常发生的"，其主语应该是某事物，而不是某个人。句中"不常发生的"是"她平时迟到"这件事，而不是"她"。