Survival Chinese Lesson 16 Buying Things

A: 先生，有茄子吗？
    Xiān shēng, yŏu qiézi ma?
    Do you have eggplants here, sir? 

B: 有，这些都是。你要哪种？
    Yŏu, zhè xiē dōu shì. Nĭ yào nă zhŏng?
    Yes, all those are (eggplants). What kind do you  want?

A: 这种茄子多少钱一斤？
    Zhè zhŏng qiézi duōshao qián yì jīn?
    How much for this kind?

B: 两块五一斤。
    Liăng kuài wŭ yì jīn.
    2.5 Yuan for one catty.

A: 我要一斤。
    Wŏ yào yì jīn.
    I'll take one catty.

Demonstrative pronouns: 这(zhè) This & 那(nà) That

When the demonstrative pronoun 这(zhè) This & 那(nà) That functions as an attributive, the noun it qualifies also takes a measure word before it. 

Examples:
 这种茄子 this kind of eggplant
 这个月 this month
 那位老师 that teacher