形容词带宾语从句用if还是Whether引导 whether/if引导的宾语从句
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1
whether\u548cif\u90fd\u53ef\u4ee5\u5f15\u5bfc\u5bbe\u8bed\u4ece\u53e5\uff0c\u8868\u793a\u201c\u662f\u5426\u201d\uff0c\u5728\u53e3\u8bed\u6216\u95f4\u63a5\u5f15\u8bed\u4e2d\u4e24\u8005\u53ef\u4ee5\u4e92\u6362\u4f7f\u7528\u3002\u5982\uff1a
I wonder if / whether I can get some advice from you.
Ask him whether / if he can come.
\u4f46\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0cwhether\u548cif\u7684\u7528\u6cd5\u6709\u4e00\u5b9a\u533a\u522b\u3002
1. whether\u5f15\u5bfc\u7684\u4ece\u53e5\u5e38\u53ef\u4ee5\u4e0e\u8fde\u8bcdor\u6216or not\u76f4\u63a5\u8fde\u7528\uff0c\u800cif\u4e00\u822c\u4e0d\u80fd\u3002\u5982\uff1a
\u6b63\uff1a Let me know whether you can come or not.
\u8bef\uff1a Let me know if you can come or not.
2. \u5f53\u5bbe\u8bed\u4ece\u53e5\u63d0\u5230\u53e5\u9996\u65f6\uff0c\u53ea\u80fd\u7528whether\u5f15\u5bfc\uff0c\u800c\u4e0d\u80fd\u7528if\u3002\u5982\uff1a
\u6b63\uff1a Whether it is true or not, I can\u2019t tell.
\u8bef\uff1a If it is true or not, I can\u2019t tell.
3. whether\u53ef\u4ee5\u5f15\u5bfc\u5e26to\u7684\u4e0d\u5b9a\u5f0f\uff0cif\u5219\u4e0d\u80fd\u3002\u5982\uff1a
\u6b63\uff1a I don\u2019t know whether to accept or refuse.
\u8bef\uff1a I don\u2019t know if to accept or refuse.
4. whether\u53ca\u5176\u5f15\u5bfc\u7684\u6210\u5206\u53ef\u653e\u4e8e\u4ecb\u8bcd\u4e4b\u540e\uff0c\u4f5c\u4ecb\u8bcd\u7684\u5bbe\u8bed\uff0c\u4f46if\u4e0d\u80fd\u3002\u5982\uff1a
\u6b63\uff1a I worry about whether I hurt her feelings.
\u8bef\uff1a I worry about if I hurt her feelings.
5. whether\u53ef\u4ee5\u5f15\u5bfc\u4ece\u53e5\uff0c\u4f5c\u4e3b\u8bed\u3001\u8868\u8bed\u6216\u540c\u4f4d\u8bed\uff0c\u800cif\u4e0d\u80fd\u3002\u5982\uff1a
\u6b63\uff1a It was uncertain whether he would come.
\u8bef\uff1a It was uncertain if he would come.
\u6b63\uff1a His first question was whether Tom had arrived yet.
\u8bef\uff1a His first question was if Tom had arrived yet.
\u6b63\uff1a We must consider the question whether we will take these measures.
\u8bef\uff1a We must consider the question if we will take these measures.
I don’t know whether or not he will come. 我不知道他是不是回来。
注：如果or not放在whether所引导的从句句尾，则可以用if来替换。
I don’t know whether/if he will come or not.我不知道他是不是回来。
2 在强调任意选择时,用whether…or,此时不用if替换whether。
He asked me whether I wanted to go there by train or by bus.他问我是想乘火车还是坐公共汽车去那里。
注：whether和or一起还有“不管”之意,引导让步状语从句。
Whether he drives or takes the train, he will be here on time.不管开车来还是乘火车来，他都会准时到。
3 虽引导宾语从句，但为了强调宾语部分，也可把从句放在句首，此时只用whether不用if。
Whether he will come I am not sure.他是不是来我拿不准。
4 从句作介词宾语时只用whether不用if。
It depends on whether it will be fine.那得看是不是晴天。
5 作discuss等动词的宾语时，用whether不用if。
We discussed whether we should close the shop.我们讨论是不是该关掉商店。
6 句子中有if引导的条件句，如再有表示“是否”的宾语从句，用whether不用if。
He asked me whether I’d move to New York if I got the job.他问我如果我得到那份工作是否会搬家到纽约。
7 容易产生歧义时用whether不用if来表示“是否”。
Please let me know if you need help. 如果你需要帮助请告诉我。或：请告诉我你是否需要帮助。对比：Please let me know if you need help.请告诉我你是否需要帮助。
8 如果宾语从句为否定句时，则只用if不用whether。
I don’t know if it won't rain tomorrow. 我不知道明天是不是会下雨。
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