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howwhatif和wether的区别求大神帮助how和what中那个howhardheis和whathardworkitis中he和it的区别是什么,可不可以说成whathardworkheisworking.和howhardtheworkheisworking有什么区别if和wether

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how what if 和 wether的区别求大神帮助
how 和what中那个 how hard he is 和 what hard work it is 中he 和it 的区别是什么,可不可以说成what hard work he is working .和how hard the work he is working 有什么区别 if 和wether 的区别是什么?上一次写make sure if they have a good life especially in poor area 的时候老师说一定是wether而不能使用if,
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how hard he is ! 他多么硬! 他多么困难! 显然这句是错的 你可以说how hardworking he is ! 他是多么的努力 what hard work he is working语法句法上无误 但是显得有些累赘 罗嗦 直接how hard he is working就可以了啊 至于你说的what hard work he is working .和how hard the work he is working 的区别就是 WHAT引导的感叹句 主语是名词 HOW引导的 主语是形容词 if 和whether 的区别 一、if或whether引导宾语从句时,作“是否”讲,常放在动词ask 、see 、say 、know和find out等后面.一般情况下,两者常可换用,在口语中多用if.如: 例1 Nobody knows whether (if) it will rain tomorrow. 没有人知道明天是否下雨. 例2 Lucy asked whether (if) they had a cotton sweater .露西问他们是否有棉制的羊毛衣. 二、if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态. 1 if或whether不能和that 或其它连词(副词)同时使用,也不能省去.如: 例3 我不知道他今天是否会来. [误] I don’t know that if(whether) he will come here today . [正] I don’t know if(whether) he will come here today . 例4他走过来看看猫是否出了毛病. [误] He came to see what if (whether) there was wrong with his cat . [正] He came to see if (whether) there was wrong with his cat . 2 if或whether引导的宾语从句时,虽具有疑问意义,但从句语序应用陈述句语序.如: 例5 Did you know the way to the hospital ? The old woman asked me . The old woman asked me .if (whether) I knew the way to the hospital .老妇人问我是否知道去医院的路. 3 if或whether引导的宾语从句应和主句的时态保持一致.即主句为一般现在时,从句用任一种时态;主句为一般过去时,从句则用过去时中的任一种时态.如: 例6 I don’t know if (whether) he has come here . 我不知道他是否来过这儿. 例7 Tom asked if (whether) I had read the book . 汤姆问我是否看过这本书 . 三、if和whether的区别: 1 在动词不定式之前只能用whether .如: 例8 I can’t decide whether to stay. 我不能决定是否留下. 2在whether …… or not 的固定搭配中.如: 例9 I want to know whether it’s good news or not . 我想知道是否是好消息. 3 在介词后,只能用whether.如: 例10 His father is worried about whether he lose his work . 他的父亲担心是否会失去工作. 4宾语从句放在句首表示强调时,只能用whether .如: 例11 Whether they can finish the work on time is still a problem . 他们是否能准时完成这项工作还是个问题. 5用if会引起歧义时,只用whether.如: 例12 Could you tell me if you know the answer ? 这句话有两种意思:“你能告诉我是否知道答案吗?”或“如果你知道答案,请告诉我,好吗?”.如用whether可避免歧义.