Columbia subject headings:
English language--Grammar.
English language--Usage.
Harvard subject headings:
English language--History--Problems, exercises, etc.
English language--Spoken English--Problems, exercises, etc.
English language--Standardization--Problems, exercises, etc.
English language--Variation--Problems, exercises, etc.
Princeton subject headings:
English language--Usage--Problems, exercises, etc.
English language--Variation--Problems, exercises, etc.