(1) 专有名词和(第一次使用)一些不可数名词时前面通常不用。如:China is a very large country.(中国是个大国) / Man needs air and water.(人类需要空气和水)
(2) 名词前已有指示、物主或不定代词作定语时不用。如:My pen is much more expensive than yours.(我的钢笔比你的昂贵多了)
(3)周名,月名或季节名前一般不用。如:He was born on Monday, February 18,1995.(他出生在1995年二月十八日,星期一) / They usually plant trees on the hills inspring.(春天他们通常在山上植树)
(4) (第一次使用)复数名词表示人或事物的类别时不用。如:Men are cleverer than monkeys.(人比猴子聪明)
(5)三餐饭前不用。如:We have breakfastat home and lunch at school.(我们在家吃早饭,在校吃午饭)
(6)节、假日前一般不用。如:On Children’s Day the boys often get presents from their parents.(在儿童节,这些男孩经常得到父母的礼物)
(7)球类名词前不用。如:The children play football on Saturday afternoons.(孩子们星期六下午踢足球)