nǐ jiào shénme míngzi?
What's your name?
你好,我叫……
Hello, my name is...
The phrase is 你好 (hello) + 我 (I) + 叫 (called) + your name. 叫 means 'to be called' and is used for names.
您好,我叫……
nín hǎo, wǒ jiào...
Hello (polite), my name is... — More polite because 您 (nín) is the formal 'you'.
我叫……
wǒ jiào...
My name is... — Shorter version without the greeting.
你好,我叫小明。
nǐ hǎo, wǒ jiào xiǎo míng.
Hello, my name is Xiao Ming.
你好,小明,我叫小红。
nǐ hǎo, xiǎo míng, wǒ jiào xiǎo hóng.
Hello, Xiao Ming, my name is Xiao Hong.
Appropriate
Avoid when
You say 'nǐ hǎo, wǒ jiào...' followed by your name. For a more polite version, use 'nín hǎo, wǒ jiào...'.
Pronounce it as 'nee how, waw jyaow'. The tone for 你 (nǐ) is third tone, 好 (hǎo) is third tone, 我 (wǒ) is third tone, and 叫 (jiào) is fourth tone.
Use it when introducing yourself to someone for the first time. It is polite and standard in both casual and formal situations.
Tomyo
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