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___today is from what it was 40 years ago

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___today is from what it was 40 years ago
A How different life
B How different a life
C What different life
D What a different life
A,C还是不明白有什么差别.我知道HOW是加形冠名,WHAT是加冠形名,可是冠词拿掉不是都一样了嘛(⊙_⊙)?
感叹句通常有what,how引导,表示赞美、惊叹、喜悦、等感情.what修饰名词,how 修饰形容词,副词或动词,感叹句结构主要有以下几种:
  掌握它的搭配,即掌握了感叹句的重点.
How +形容词+ a +名词+ 陈述语序.例如:How clever a boy he is!他是多聪明的孩子!
How+形容词或副词+陈述语序.例如:How lovely the baby is!小毛头真可爱!
What +名词+陈述语序.例如:What noise they are making!他们真吵!
What +a+形容词+名词+陈述语序.例如:What a clever boy he is!他是多聪明的孩子!
What+ 形容词+复数名词+陈述语序.例如:What wonderful ideas (we have)!我们的主意真棒!
What+ 形容词+不可数名词+陈述语序.例如:What cold weather it is!多冷的天!
What a clever boy he is!的省略形式为:What a clever boy!
典型例题
1)___ food you've cooked!
A.How a nice  B.What a nice  C.How nice  D.What nice
答案D.由于How 修饰形容词,副词;what修饰名词.且food为不可数名词,因此A,B 排除.C的 How + adj.后面不能再加名词,因此只有D正确,其句型为What + adj.+n.(不可数).
2)___terrible weather we've been having these days!
A.What  B.What a  C.How  D.How a 
答案A.weather为不可数名词,B,D排除.C为how + adj.后面不应有名词.只有A,符合句型What +形容词+不可数名词.
3) --- _____ I had!
--- You really suffered a lot.
A.What a time  B.What time   C.How a time   D.how time
答案A. 感叹句分两类:
     1:What + n.+主谓部分
     2:How + adj./ adv./ v.+主谓部分.本题属第一种,但省略了bad,相对于 What a bad time I had!这是个习惯用语.