Noun Specifiers

In Chinese Mandarin language, Specifiers (SP) are a special group of Noun modifiers. Here are some commonly used Specifiers: 
这 - zhè (zhèi) - this 
那 - nà (nèi) - that 
每 - měi - each, every 
哪 - nǎ (něi) - which?

Specifier is normally followed by a number, a measure word and a noun itself:

SP + NU + M + N

However, a noun may be omitted when it is understood from the context. 这 and 那 can stand alone as a subject (without a measure word).

If the number is "one", it may be omitted, too.