what引导名词性从句的用法

whatwhat引导名词性从句的用引导名词性从句的用法法1.I dont know what you mean.2.Now you can see what a serious problem the population is.什么多么What的基本含义一、用法归纳一、用法归纳 1.表示表示“的东西或事情的东西或事情”“所所 的的”，相，相当于当于“the thing that.;all that.;everything that.”Theyve done what they can do to help her.他们已经尽力帮助了她。他们已经尽力帮助了她。He saves what he earns.他赚多少，积蓄多少。他赚多少，积蓄多少。What Mary is is the secretary.玛丽的职务是秘书。玛丽的职务是秘书。2.表示表示“的人或的样子的人或的样子”（指抽象意义的（指抽象意义的人）相当于人）相当于the person that（见（见66）：）：He is no longer what he was.他已经不是以前的那个样子。他已经不是以前的那个样子。He is what is generally called a traitor.他就是人们通常所说的叛徒。他就是人们通常所说的叛徒。Who has made Fred he is now?what3.表示表示“的数量或数目的数量或数目”,相当于相当于the amount/number thatOur income now is double what it was ten years ago.我们现在的收入是我们现在的收入是10年前的两倍。年前的两倍。The number of the students in our school is ten times what it was before liberation.现在我校学生的数量是解放前的现在我校学生的数量是解放前的10倍。倍。4.表示表示“的时间的时间”,相当于相当于the time that：After what seemed like hours he came out with a bitter smile.似乎过了几个小时他才苦笑着出来。似乎过了几个小时他才苦笑着出来。The young girl was too frightened to speak,standing there for what seemed like hours.小女孩吓得不敢说话，在那儿站了几个小时。小女孩吓得不敢说话，在那儿站了几个小时。5.表示表示“的地方的地方”,相当于相当于the place thatThis is what they call Salt Lake City.这就是他们称为盐湖城的地方。这就是他们称为盐湖城的地方。In 1492,Columbus reached is now called America.what归纳总结：当名词性从句缺少主语、宾语、归纳总结：当名词性从句缺少主语、宾语、表语，而缺少的这个词不是指具体的人时，表语，而缺少的这个词不是指具体的人时，要首先考虑要首先考虑what6.有时有时what 可用作限定词，其后修饰一个名词可用作限定词，其后修饰一个名词，表示：倾其所有表示：倾其所有I gave him what books I had.我把我所有的书都给他了。我把我所有的书都给他了。He gave me what money he had.他把身边带有的钱全给了我。他把身边带有的钱全给了我。what 后的名词可以是后的名词可以是复数名词或不可数名词复数名词或不可数名词，但通常但通常不不能是能是单数可数名词单数可数名词：误：误：I gave him what book I had.7.A is to B what C is to D句型分析句型分析 句型句型:A is to B what C is to D.本句型的意思是本句型的意思是“A对对B而言正如而言正如C对对D一样一样”。其中。其中what 的意思相当于的意思相当于 as（但在此句型不能用（但在此句型不能用as代替）代替）,作连词作连词用用,引导状语从句。引导状语从句。Air is to us what water is to fish.空气对于我们犹如水对于鱼。空气对于我们犹如水对于鱼。其中介词其中介词to表示对比表示对比巩固练习巩固练习:1.She has changed a lot.Shes no longer _she used to be.A.that B.what C.which D.不填不填2.The tobacco which is used to make cigarettes was first grown in_is now part of the United States.A.which B.that C.all D.what3.No longer_Tom the man_he used to be.A.will;what B.was;what C.will;that D.is;that4.What has made China_she is today?A.that B.what C.as D.which5.The number of the students of the college has reached 8,000,twice _ it was when the college was opened ten years ago.A.what B.as much C.which D.that二、用法说明二、用法说明(1)这样用的这样用的what相当于相当于“先行词先行词+关系代词关系代词”，所以其前不能有先行词：，所以其前不能有先行词：你喜欢什么就拿什么吧。你喜欢什么就拿什么吧。正：正：You can have what you like./You can have everything(that)you like.误：误：You can have everything what you like.