The difference between what a and how a in English

I can answer this question. Although my spoken English is not very good, I am still familiar with the vocabulary of CET-4 and CET-6. I will give you a detailed explanation from three aspects:

meaning

Without the usage of how a, the sentence structure of what a and how leading interjections is different: what+a/an+ adjective+countable noun singular+subject+predicate! How+ adjective +a/an+ countable noun singular+subject+predicate!

use

Usage of exclamatory sentences guided by what and how:

First of all, what guides the interjection?

1, the sentence pattern can be used: "What+A/An+ adjective+countable noun singular+subject+predicate!" .

For example, what a nice gift! What a nice gift this is!

2. Available sentence patterns: "What+ adjective+countable noun plural+subject+predicate!" .

What beautiful flowers they are! What beautiful flowers!

3. Available sentence patterns: "What+adjective+uncountable noun+subject+predicate!" .

How nice the weather is today! How nice the weather is today!

Second, how to guide exclamations

1, the sentence pattern can be used: "How+ adjective/adverb+subject+predicate!" .

How careful she is! How careful she is!

2. Available sentence patterns: "How+ adjective +a/an+ countable noun singular+subject+predicate!" .

What a beautiful girl! What a beautiful girl she is!

3. Available sentence patterns: "How+ Subject+Predicate!" .

How time flies! How time flies!

Thirdly, exclamatory sentences guided by what and how can sometimes be converted, but the order of some words in the sentence should be changed.

What a beautiful girl! What a beautiful girl she is!

How delicious these cakes are! How delicious these cakes are!

differentiate

The difference between exclamatory sentences what and how:

First, the exclamatory sentence guided by "what": "what" means "how" and is used as an attribute to modify the noun (emphasized part). The indefinite article a/an should be added before singular countable nouns, and no article should be used before plural countable nouns or uncountable nouns. The structural form of this sentence is:

What+(a/an)+adj+n .+ subject+predicate (that is, subject plus predicate).

What a clever girl! What a clever girl!

Second, the exclamatory sentence guided by "how": "how" means "how", which is used as an adverbial to modify adjectives or adverbs (emphasis). If the adjective is modified, the predicate verb in the sentence is a copula; If how modifies adverbs, the predicate verb in the sentence is an action verb. The structural form of this sentence is:

How+adj.(adv.)+ subject+predicate (that is, subject plus predicate).

How cold it is today!

How cold it is today!