take care of 的被动语态?

take care of 的被动语态?
We should take care of the old men.
被动形式是什么呢?
The old men should be taken care of
还是Care should be taken of the old men?
我见过那个make use of 用的是被动的time be made use of
pay attention to,attach importance to,give birth to
这两个应该是怎么变被动啊
Great importance should be attached to learning English.
Learing English should be attached to great importance.
这些三个词的短语动词在变被动的时候,双宾语性质的用直接宾语做主语,而非双宾语的用后面的宾语做主语,把它们一个整体的及物动词.
还牵扯到一个give rise to
The emission of CO2 has given rise to global warming.
被动 Rise has been given to global warming by the emission of CO2.
还是Global warming has been given rise to by the emission of CO2.
怎么看这两个都不对啊?
应该是英语里有些主谓宾结构的句子是不宜用被动的吧?
比如:The little fish eventually found her way into the ocean.
小鱼最终回到了大海母亲的怀抱
你总不能被动成
Her way was found into the ocean吧?
如果您对这个问题感兴趣,不要吝惜您的电子笔墨!回答精彩有加分哟偶!