【问】 I substituted your name for mine on the list.

我一直记不住substitute A for B到底是谁代替谁。

【答】 有两个方法可以很容易地记住substitute A for B所表达的意义。一是记住for后面的成分总是“被代替者”;二是记住substitute A for B与replace A with B所表达的关系恰好相反;前者是用A代替B，后者则是用B代替A。

请翻译下面的句子：

1. She substituted a fake diamond for the original.

2. You are to choose the one word or phrase that best keeps the meaning of the original

sentence if it is substituted for the underlined word or phrase. (TOEFL)

3. A new book was substituted for the one that had been lost. (RBE)

4. We have replaced slave labour with(by) machines. (LDCE)