Common mistakes in English - category Semantics

'to both ...' with more than two items May 20001 (May 2001) Inconsistent case: She'S (She's) Interval scale: doubling values ('twice as hot') square roots (2 solutions) Light-year as a unit of time wrong suffix of ordinal number Invalid date, like 'February 31, 2014' Weekday doesn't match date for the current year Weekday doesn't match date A new year has begun Future date, but verb in past tense Winter 20211 (2021) abbreviation for bachelor's degree abbreviation of 'philosophiae doctor' (PhD)