我不知道他是否会来。

　　There is some doubt whether he will come in time.

　　他是否能及时赶到值得怀疑。

　　即时演练2

　　根据要求完成下列题目

　　①"Have you seen the film？" he asked me.(改为宾语从句)

　　→He asked me whether/if_I_had_seen_the_film.

　　②我为是否伤了她的感情而忧虑。(完成句子)

　　 I worry about whether_I_hurt_her_feelings.

　　③我不知道他是否会出席会议。(翻译句子)

　　I_don't__know_if/whether_he_will_attend_the_meeting.

　　(3)连接代词和连接副词引导的宾语从句

　　连接代词 who, whom, whose, what, which, whatever, whoever, whomever, whichever和连接副词when, where, how, why，这些连接词都有词义，除引导从句外，还在从句中充当一定的成分，可作主语、宾语、表语、定语、状语等。这种宾语从句有疑问意义，但不是疑问句，不能用疑问语序，而要用陈述语序。

　　The Police asked me how the accident happened.

　　警察问我事故是怎么发生的。(how作状语)

　　He wanted to know what the manager had said at the meeting.

　　他想知道经理在会议上说了些什么。(what作宾语)

　　Do you know who will be sent to work in Xinjiang?

　　你知道会派谁去新疆工作吗？(who作主语)

　　He didn't tell me when we would meet again.

　　他没告诉我什么时候我们再相见。(when作状语)

　　Can I speak to whoever is in charge of this project?

　　我能和负责这个项目的人谈谈吗？(whoever作主语)

　　[点津]　"疑问词＋­ever"结构的词可以引导名词性从句和让步状语从句，而"no matter ＋疑问词"结构只能引导让步状语从句。

　　[辨析]　what和which引导宾语从句的区别

what 意为"什么"，所涉及之物无范围 which 意为"哪一个"，所涉及之物有范围 　　They wanted to see which shop would offer the best service. (他们要看好几家商店)

他们想看看哪家商店提供的服务最好。