英语感叹句what和how的用法

英语中，感叹句用来表达强烈的情感或惊讶。"What"和"how"引导的感叹句分别用于不同场合。"What"用于感叹名词或名词短语，结构为"What + (a/an) + 形容词 + 可数名词单数 + 主语 + 谓语！"或"What + 形容词 + 不可数名词/可数名词复数 + 主语 + 谓语！"。例如："What a beautiful day!""How"用于感叹形容词、副词或动词，结构为"How + 形容词/副词 + 主语 + 谓语！"或"How + 主语 + 动词！"。例如："How fast he runs!""What"感叹名词，"How"感叹形容词、副词或动词，根据语境选择使用。

Exclamatory sentences are used to express emotions such as joy, surprise, or astonishment. In English, these sentences are often introduced by either "what" or "how." The key difference lies in their function: "what" is used to modify nouns, which can be preceded by articles and adjectives, while "how" is used to modify adjectives, adverbs, or verbs.

Usage of 'What' in Exclamatory Sentences

Exclamatory sentences led by "what" can be structured in two ways:

• What + a/an + (adjective) + singular countable noun + subject + verb!
  For example: "What a fine day it is!"
• What + noun phrase + subject + verb!
  For example: "What kind women they are!" or "What nice music it is!"

Additionally, "what" can be used with plural countable nouns or uncountable nouns:

• What + (adjective) + plural countable noun or uncountable noun + subject + verb!
  For example: "What kind women they are!" or "What nice music it is!"

Usage of 'How' in Exclamatory Sentences

Exclamatory sentences led by "how" are used to modify adjectives, adverbs, or verbs and can be structured as follows:

• How + adjective/adverb + subject + verb!
  For example: "How hard the workers are working!" or "How clever the girl is!" or "How quickly the boy is writing!"
• How + subject + verb!
  For example: "How time flies!"

It's important to note that "how" and "what" can sometimes be interchangeable without changing the meaning of the sentence:

• "How clever a girl she is!" is equivalent to "What a clever girl she is!"
• "What delicious cakes these are!" is equivalent to "How delicious these cakes are!"

In contexts of strong emotional expression, exclamatory sentences introduced by "how" or "what" may be elliptical, omitting the subject and verb:

• "How wonderful!"
• "What a fine day!"

Lastly, exclamatory sentences with "how" or "what" are inherently emphatic and typically do not include words like "very," "rather," "quite," or "extremely" to avoid redundancy:

• Incorrect: "How very fast he runs!"
• Incorrect: "What extremely beautiful flowers they are!"