Why learn Mandarin?
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*Over 1,100,000,000 speak Mandarin as a mother tongue or second language worldwide. OK, OK, OK, so most of that billion lives in China. But at least a good couple million or so speak it in other countries in Asia(as a first language).
*Mandarin is widely understood and studied in many countries of East and Southeast Asia. And I mean WIDELY. Consider about 200,000,000 who speak Arabic throughout the Middle East. That is only about 20% of all Mandarin speakers.
*China has one of the fastest growing economies in the world.
*China is one of the most powerful countries in the world.
*Chinese words are mainly monosyllabic, so they're easy to remember. No здравствуйте's here!
*Knowing how to read Chinese characters, you will also be able to understand some written Japanese, as well as be able to communicate through writing with any literate Chinese.
*You'll be able to read the tattoos people get(for a funny article about the dangers of Chinese tattoos, follow this link http://www.cantonese.sheik.co.uk/essays/tattoos.htm)
*You'll impress girls. I noticed a 200% gain in the amount of girls that approached me after I started learning Mandarin. Compare that to a measly 25% gain after learning Russian. Studies have shown that students of Mandarin have the highest "studliness increase" of all foreign language students.
*You'll probably also get interested in Chinese culture and be able to tell people that the "Orange Chicken" crap they got from "Golden Five Brothers" isn't real Chinese food.
Facts about Mandarin
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*Mandarin is a tonal language, like many Asian languages, meaning that if a word is pronounced with different tones, the meaning can change. An example is jiao1 which means "to teach" and jiao4 which means "to be called." Mandarin has 4 tones plus a neutral tone. Some other dialects, like Cantonese, have up to 10.
*Mandarin words end only in vowels or the consonants "n" and "ng", in contrast to Cantonese and other dialects which can end with hard sounds like "k", "t", "p", etc.
*Mandarin words are mainly monosyllabic.
*There is no conjugation of verbs in Mandarin. There is no past or future tense either.
*There are no genders in Mandarin. There are, however, classifiers, which are used when you are referring to how much of a certain item.
*There are no cases in Mandarin.
*Mandarin is an SVO language, like English, meaning that in regular sentences, the subject comes first, then the verb, then the object.
*Mandarin, like all other dialects of Chinese, is written with Chinese characters. It can be romanized with the Pinyin system.
*Mandarin is spoken as a first language in northern and southwestern China. Mandarin is the official language of the People's Republic of China and the Republic of China(Taiwan). Hongkong and Macau speak mainly Cantonese.
*Mandarin has smaller local dialects which could be likened to the differences between British and American English.
*The official, standardized form of Mandarin that is used by the Chinese government is called 普通话(pu3tong1hua4, pu3tong1 = common, hua4 = speech).
*The name "Mandarin" comes from Portuguese, where it means something like "minister." Mandarin was the language of government officials.
I've got to go now, anyone feel free to add anything else.