219. Often these children realize that they know more than their teachers and their teachers often feel that these children are arrogant, inattentive, or unmotivated.

译文　这些孩子往往认为他们比老师知道得还多，而老师们则感到这些孩子傲慢无礼、漫不经心或缺乏学习的动力。

点睛　本句的主干是...these children realize that...。该句中的第一个that引导realize的两个宾语从句；第二个that引导feel的宾语从句。

arrogant意为“傲慢的；自大的”。如：

One should never be arrogant even when he is at his best. 一个人在其最辉煌的时候也不应傲慢自大。

inattentive意为“漫不经心的；怠慢的，疏忽的”。如：

She is inattentive to her guests. 她对客人招待不周。

unmotivated意为“没有动力的”。如：

Unmotivated students are the despair of their teachers. 没有学习动力的学生让老师感到绝望。

考点归纳　always、usually、often和frequently都是频度副词，而它们所表示的频率逐一递减。

always表示的频率最高。如：

He always goes to bed late. 他总是睡得较晚。

usually表示的频率仅次于always。如：

He usually goes to bed early. 他通常睡得较早。

often表示的频率相对更低。如：

He often goes to bed early. 他经常睡得较早。

frequently也表示“时常”，但语气较强，尤其强调短期内次数的频繁。如：

Buses run frequently from the city to the airport. 时常有公共汽车从市内开往飞机场。