作定語的'名詞往往是說明其中名詞的材料、用途、時間、地點、內容、類別等。
⒈材料
a diamond necklace
a bamboo pole
paper money
a stone bridge
⒉用途
a meeting room
the telephone poles
the railway staion
trade union
water pipe
welcome speech
eye drops
⒊時間
a day bed
the dinner party
the Apring and Autum Period
evening suit
midday lunch
⒋地點
London hotels
Beijing University
body temperature
the spaceship floor
the kitchen window
⒌內容
a story book
piano lessons
the sports meet
oxygen supply
the air pressure
the grammar rules
⒍類別
children education
enemy soldiers
a bus driver