I don't know he will come tomorrow or not 括号中该填whether还是if 还是weather

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• I don't know he will come tomorrow or not 括号中该填whether还是if 还是weather
• I don't know he will come tomorrow or not 括号中该填whether还是if 还是weather
• 请说出下列句子中need用作情态动词还是行为动词1)He needs to come early.( )2)Does he need to know this now?( )3)Need I write the letter now ( )4)You don't need to tell him the news.( )
• I don't know__he will come tomorrow.这里为什么用if而不是whether
• 请教任何翻译：“Where will he be?和”“What will he take park in?谢谢!