He had to wait for 15 minutes before we came(alternative). his son will be in the sixth form next year(general) we shall work harder next year(special) my elder brother joined the air when he was 17(special) i was looking at your photos while you were out( special) he hasn't done any work today(disjunctive) he smokes a pipe after supper.(general) he saw a nice tie in the shop window( special) the porter was hardly able to carry my luggage(special)