He said，‘If I catch the plane I’ll be home by five．’

　　他说：“我如果能赶上这班飞机，5点钟以前就可以到家了。”相当于：

　　He said that if he caught the plane he would be home by five．他说他如果能赶上那班飞机，5点钟以前就可以到家了。

　　条件句类型2的基本形式在这里时态不变：

　　‘If I had a permit I could get a job，’he said．他说：“如果我有许可证就能找到工作。”相当于：

　　He said that if he had a permit he could get a job．他说如果他有许可证就能找到工作。

　　条件句类型3的基本形式在这里时态不变：

　　‘If she had loved Tom，’ he said，‘she wouldn’t have left him．’

　　他说：“如果她喜欢汤姆，就不会离开他。”相当于：

　　He said that if she had loved Tom she wouldn’t have left him．他说如果她喜欢汤姆的话就不会离开他。

　　关于if从句＋命令或者要求在间接引语中的例句：

　　He said，‘If you have time wash the floor．’

　　他说：“如果你有时间，擦一擦地板。”

　　He said，‘If you have time would you wash the floor？’

　　他说：“如果你有时间，你能擦一擦地板吗？”相当于：

　　He told/asked me to wash the floor if I had time．他叫/要我有时间的话擦一擦地板。

　　He said that if I had time I was to wash the floor．他说如果我有时间的话就擦一擦地板。

　　‘If you see Ann ask her to ring me，’he said．他说：“如果你遇到安，叫她给我打个电话。”相当于：

　　He said that if I saw Ann I was to ask her to ring him．他说如果我看到安，告诉她给他打个电话。（这里如用 ask＋不定式结构就变得很拗口，也不十分清楚。）Peter（on phone）： If you miss the last bus get a taxi．彼得（在打电话）：如果你们误了末班车，就雇一辆出租汽车。

　　Peter says that if we miss the last bus we are to get a taxi．彼得说如果我们误了末班车就雇一辆出租汽车。

　　关于在间接引语中的if从句＋劝告的表示法：

　　‘If you feel ill，’she said，‘why don’t you go to bed？’/‘…you’d bet－ ter go to bed．’

　　她说：“如果你感到不舒服为什么不躺一下？”/…你最好上床休息。

　　She advised me to go to bed if I felt ill．她劝我，如果感到不舒服了就上床休息。

　　She said that if I felt ill I’d better/I should go to bed．她说如果我感到不舒服了我最好/应当上床休息。

　　‘If I were you I’d stop taking pills，’she said．她说：“如果我是你的话，我就停止吃药。”相当于：

　　She advised me to stop taking pills．

　　她劝我停止吃药。

　　if从句＋疑问句结构在间接引语中通常把if从句置于句末：

　　‘If the baby is a girl what will they call her？’ he wondered．他心里想：“如果生的是个女孩，他们会给她取个什么名字？”相当于：

　　He wondered what they would call the baby if it was a girl．他心里想，如果生的是个女孩，他们会给她取个什么名字。

　　‘ If the door is locked what shall I do？’ she asked．她问道：“如果门锁了我该怎么办？”相当于：

　　She asked what she would do if the door was locked．她问如果门锁了她该怎么办。