how引导的感叹句:(1)How + 形容词/副词(+ 主语 + 谓语 + 其他)!►How tall the tree is! 多么高的树呀!(2)How + 形容词 + a/an + 可数名词单数

how引导的感叹句:(1)How + 形容词/副词(+ 主语 + 谓语 + 其他)!►How tall the tree is! 多么高的树呀!(2)How + 形容词 + a/an + 可数名词单数(+主语+谓语)!►How beautiful a flower! 多美的一朵花呀![拓展]what引导的感叹句通常可与how引导的感叹句进行转换。►What a lovely girl she is! = How lovely a girl she is! 她是多么可爱的一个女孩啊![典例]Guan Dong saved an old lady out of the Yangtze River. _____ great courage he showed! A. What a B. What C. How a D. How

To determine the correct exclamation for "_____ great courage he showed!", we need to analyze the structure of exclamations with "what" and "how" and identify the type of noun in the sentence.

Key Analysis

The core noun here is "courage", which is an uncountable noun (it cannot be preceded by "a/an" or made plural).

"What" is used with nouns. Its structure for uncountable nouns is:
What + adjective + uncountable noun + (subject + verb)!
Example: What great patience she has!

"How" is used with adjectives or adverbs, not directly with nouns. Its structure is:
How + adjective/adverb + (subject + verb)!
Example: How patiently she waited!

Evaluation of Options

A. What a: Incorrect. "A" requires a singular countable noun, but "courage" is uncountable.

B. What: Correct. Follows the structure "What + adjective (great) + uncountable noun (courage) + subject (he) + verb (showed)".

C. How a: Incorrect. "How" modifies adjectives/adverbs, and "a" is invalid for uncountable nouns.

D. How: Incorrect. "How" would require an adjective/adverb alone (e.g., How great his courage was!), not directly modifying a noun.

Answer: B