Mr Harris, [a former English teacher], is used to getting a sore throat.
Mr Harris, (who was [formerly] [an English teacher]), is used to getting a sore throat.
[a former English teacher] oraz [formerly] i [an English teacher] sa tylko frazami
(who was formerly an English teacher) jest zdaniem podrzednym, w ktorego sklad wchodza frazy [formerly] oraz [an English teacher]