The adverbs 多 and 多么
Adverbs of degree (程度副词) are used to intensify or modify the degree of an adjective (or verb): very, really, extremely.
Apart from meaning “a lot”, 多 
can act as an adverb of degree.
When placed before adjectives, 多 has the meaning “quite”, “really”, “how”.
It gives a sentence an intonation of exclamation.
can act as an adverb of degree.
When placed before adjectives, 多 has the meaning “quite”, “really”, “how”.
It gives a sentence an intonation of exclamation. Pay attention
The particle 啊 or the particle 呀 is often placed at the end of a sentence.
or the particle 呀 is often placed at the end of a sentence.Examples
你们的儿子已经多高
Your son is tall enough
nǐmen de érzi yǐjīng duō gāo
米山的口语多好啊
Misha’s level of speaking is really good
mǐshān de kǒuyǔ duō hǎo a
In this sense, the adverb 多么 can also be used to mean “how..!", "such..!”.
can also be used to mean “how..!", "such..!”. Pay attention
In spoken language, it is pronounced as 多么 .
.Examples
这里的风景多么漂亮！
Such beautiful scenery here!
zhèlǐ de fēngjǐng duōme piàoliang
你看人家做得多么好啊！
Look, how cool he is doing it!
nǐ kàn rénjiā zuò de duōme hǎo a