用代词时,检查指代关系是否清楚。 例1: a) Sometimes teachers will inform students of the heavy burden theyhave to bear. b) Sometimes a teacher will inform students of the heavy burden he has to bear. 分析:they 既可指代teachers, 也可指代 students,明显的是指代不清。其实只要把其中一个名词变成单数,用he和 they分别代不同的名词,就清楚了。因为 a teacher也可泛指所有教师。 例2: a) Someone believes that the teacher's task is to give students knowledge, which may not be true. b) Someone believes that the teacher's task is to give students knowledge, a notion which may not be true.