例句：A radio message from the mainland had been received by the ships captain instructing him to give up the search.
问题：后面是动名词引导的从句吗？能否补充完整为which was instructing him to give up the search?
此句能否改为：A radio message from the mainland which had been received by the ships captain instructed him to give up the search.
A radio message from the mainland had been received by the ships captain instructing him to give up the search.
问题：
1.后面是动名词引导的从句吗？能否补充完整为which was instructing him to give up the search。
【答】
1. 动名词引导的从句——该说法不正确。
2. instructing him to give up the search，是目前分词短语作定语，修饰a radio message。中间隔着had been received by the ships captain。这种现象叫做“词汇分隔（定语和被修饰语被谓语所分隔）”。又如：
The problem arose of what to do with the money.
The time is coming to prepare for Christmas.
3. 可以变成定语从句：which was instructing him to give up the search，但稍嫌啰嗦，不如目前分词简练。
2. 此句能否改为：A radio message from the mainlandwhich had been received by the ships captain instructed him to give up the search.
【答】如此变化后，语法很好。但意思与原句出现不同。原句的中心意思是“无线电报被船长收到”，改后的句子是“无线电报指示船长舍弃研究”。
