(1) adj.→v.
The manager is grateful to the customers for their valuable suggestions.
译文：经理十分感谢顾客提出的宝贵建议。
(2) n.→adj.
In all this great serenity of ocean it is seldom that we espy so much as another ship.
译文：在这平静的大海上，我们难得看见其他船只。
还有其它词类转移的情况，这里将不再一一赘述，总之，词类转移要遵守忠实与通顺的原则。
deny 否决，否定→不给予
miss 错过→没赶上(交通工具)；没听(看到)或没听(看懂)
live up to one’s expectations 不(没)辜负……的希望
divert attention from 将注意力从……移开→没有意识到
be absent 未出席，没来
far from 远非；完全不
final 最终的→不可改变的
idly 漫不经心地，无所事事地
be at a loss 不知所措
rather than/instead of 而不是
absent-minded 心不在焉的
but for 要不是；如果没有
The scientists made a solemn pledge at the conference, saying, “We’ll forever live up to what our Party expects of us.”
译文：科学家在会上庄严宣誓：“我们绝不辜负党对我们的期望。”
(2)需要反义正译的词汇是含有no或not的一些短语，如：
no less than 实在是；正如；不少于
no less…than 和……一样；不亚于
no other than 只有；正是
none other than (用以加强语气) 正是，恰恰是，不是别人，正是……
nothing but 只有(是)；只不过
no choice but 别无选择，只(好)得
以及一些带有否定词缀的词，如：
unfold 展开，呈现
disappear 消失，失踪
carelessly 马马虎虎地，粗心地
From the passage we learn that an invention will not benefit the inventor unless it is reduced to commercial practice.
It is obvious that his period in office was marked by steep rise in his country’s oil revenues and the beginning of a social-political crisis brought out by wide-scale misuse of the $25 billion a year earning from oil.
Goodyear, an American, had been trying for years to find a way in which rubber could be made hard, non-sticky, and yet elastic.
译文：古德伊尔，美国人，多年来一直试图找到一种方法能让橡胶变得更硬、不粘黏，同时更有弹性。
(2)将被动改为主动
① 翻译成汉语的无主语，如果被动句不含by的话。
If bad weather is expected, the forecaster must be able to suggest another airport within the range of the aircraft where the weather will be suitable for landing.
译文：如果预测到有恶劣天气，天气预报员必须能够在该飞机的航程内提出另外一个天气条件适合降落的机场。
②将that引导的主语从句仍然译为宾语，但要加上表泛指的词语(如人们、大家、我们等)做主语。
如：
It is hoped that…
It is reported that…
It is said that…
It is supposed that…
It must be admitted that…
It must be pointed out that…
It is asserted that…
It is believed that…
It is well known that…
It will be said that…
It will be seen from this that…
It was told that…
I was told that…
It may be said…
It may be argued that…
注意：如果被动结构既有过去分词又有by(或in, for)引导的介词短语，这时将动作的发出者译成主语。如：It is imagined by many that…