How+形容词/副词(+主语+动词) 如:How fast it flies!How beautiful it is!
What+a/an+形容词+单数名词+it is! What +形容词+复数名词+they are!
What +形容词+不可数名词+it is!其中it is/they are也可省略如:What a tall building! What an interesting book! What nice weather! What kind girls!
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