pronoun
BAD : Will you be at home on this Sunday afternoon?
GOOD : Will you be at home this Sunday afternoon?
GOOD : Will you be at home on Sunday afternoon?
BAD : My exams are on this month.
GOOD : My exams are this month.
pronoun
BAD : Will you be at home on this Sunday afternoon?
GOOD : Will you be at home this Sunday afternoon?
GOOD : Will you be at home on Sunday afternoon?
BAD : My exams are on this month.
GOOD : My exams are this month.
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012