如何区分if whether that 用法,we'd better check the number again and make sure ____ everybody is here.a.that b.if c.when d.whether 应该选哪一个 ,

如何区分if whether that 用法,we'd better check the number again and make sure ____ everybody is here.a.that b.if c.when d.whether 应该选哪一个 , Whether if that的用法. 如何区别宾语从句中that,which,who,whom,if,whether的用法? i think造句用that,whether,if 宾语从句什么时候用if,whether,that that if与whether的区别 if和whether I don't know ____ she will go tomorrow .____ she goes ,I ' ll tell you .I don't know ____ she will go tomorrow .____ she goes ,I ' ll tell you .A.if ,Whether B.whether ,Whether C.if ,That D.if ,Ifif和whether如何区别,这道题如何 We never doubt ___David told us the truth,but we really doubt ___Daniel told us the truthA if whether B whether that C whether if D that whether 用that if/whether 各造句5个. 用that.if.whether.疑问代词各五个造句快! 用that 或if或 whether造一个宾语从句 用that,whether,if写十个宾语从句 英语上的一些区分（能有例句最好哦）1.fast与quick2.join与take part in3.whether与if他们分别有什么不同,又如何区分呢? I don't know____he will come tomorrow.Don't worry.____he comes.I'll let you knowA.whether.If B.if,Whether C.when,Whether D.that,if 宾语从句中,如何区别if和whether的用法? when和while if 和whether 引导的从句怎么区分 直接引语变间接引语时、直接引语如是是翻译疑问句、就要改成whether 或if 、那怎样区分是用whether 或if do you doubt that he will win 为什么用that为什么不用 if 或whether