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b. 宾语从句为一般疑问句或选择疑问句,从句前用if/ whether “是否” 引导,if/ whether不能省略.
Could you tell me if /whether Miss Brown lives in that house?
c. 宾语从句是特殊疑问句时,从句前用特殊疑问词引导,特殊疑问词在从句中担任句子成分,具有一定的意义, 不能省略.
Can you tell me who she is?
特殊疑问词:what, which, who, whom, whose, when, where, how, why,
how far, how long, how many, how much, how often…
= 2 ﹨* GB3 ② 宾语从句的时态。宾语从句的时态受主句的限制,
(1)主句是一般现在时态,从句根据实际情况确定。
(2)主句是一般过去时态,从句必须用相应的过去时态。
(3)如果宾语从句说的是客观真理、自然现象或事实时,这时宾语从句要用一般现在时态。
(4)在由could, would引导的主句中, 从句一般要用现在时。因为could, would经常表示礼貌或 婉转的语气, 而不是过去时。
Could you please tell me where the bank is?
Would you please tell me how far it is from here to the hospital?
= 3 ﹨* GB3 ③ 宾语从句的语序.
宾语从句的语序必须是陈述语序,既连接词(who ,whom ,whose , what, which, when, where, why, how)+主语+谓语+其他成分;或连接代词who,which,what(作主语)+谓语+其他成分
疑问语序: Be动词/助动词/情态动词+主语+……?
Am,Is,Are,Was,Were/Do,Does,Did/Have,Has,Had/Can,Could,May,Might,Must,Will,Would,Shall,
Should+主语……?
4、宾语从句注意事项
(1)当从句的原句为以下句子以及从句以what, who作主语时,语序不变:
What’s wrong? What’s the matter? What’s happening?
eg: I don’t know what’s the matter.
Can you tell me who is over there?
(2)只能用whether不能用if的情况
a. 当与or/or not连用:
I don’t know whether he’s free or not.
Mary asked whether I was doing my homework or not.
b. 在介词后面:
We didn’t think about whether it would rain the next day.
c. 在动词不定式前: