Although "那" is very similar to "哪", but they has different means.I'm sorry, I'm speaking in Chinese-English form.如果有人把该用"那"的地方用成了"哪", 很有可能是他写了个错别字了, 比如他使用拼音输入法的时候.Repeat:哪里 = 哪儿 = where, 那里 = 那儿 = there. “在那里买啤酒？“is wrong as a question in Chinese. Either “在那里买啤酒。” or “在哪儿买啤酒？”

Here has a same question, perhaps it can help you. http://www.italki.com/answers/question/158353.htm

动词 + 了 表示这个动作已经发生了, 就像英语中的过去分词(looked, done...) first 了 means looked 了吗? 表示疑问, 就像英语中的what, how, 在中文里疑问的语气是放在后面的 last 了 not use single in this sentence. 了吗 will easy to understand. 你看了他給你買的書: You looked(readed) the book he brought for you. 你看了他給你買的書了吗: Have you looked(readed) the book he brought for you? My English is poor, I hope you can understand above!

The answers of above are right, generally we use 虚假 describe something, and use 虚伪 describe somebody. We can't understand 你太虚假了! If you can understand some chinese, the following are extends:(I'm sorry my English is poor) 1. 虚假是一种书面的表达方式, 就算你说某种东西虚假的时候, 也会让人难以理解. 比如: 这张人民币是虚假的, 而你可以说: 这张人民币是假的. 有时把虚假放在你要describe的东西前面效果会好一些, 比如: 发布虚假广告是违法的! 2. 虚假其实是由 虚 和 假 组成的(虚假 contains two words: 虚 and 假), 有些时候我们的侧重点在"虚"上, 用来表示不存在的(not exists), 有些时候我们的侧重点在"假"上, 用来表示不是真的(not true)

I think it's a difficult question! In this sentence 了 comes three times, the 2nd times read as LIAO, the 3rd times read as LE, LE is a 助词 here has no meaning, you can also say: 他病了，今天来不了.I'm sorry that cannot answer this question in grammer!

1. 明天你去得了饭店? express like this will better: 明天你去得了饭店吗? (liao) 这么多菜，我一个吃饭了, this sentcnces is not correct. Is that you mean: 这么多菜，我一个吃了! (le) 作这点练习，用不了半个小时。(liao) 2. 前边走来一个外国人. in this sentcnces 走 not use single, 走来 will easily to understand 走来 means come, just like: here comes a foreigner. 走 describe the action(动作), not run(跑)... 3. 上星期走了一个美国学生。same as 2. 走 not use single, 走了 will easily to understand (le) 了 like -ed in english, 走了means gone, in the past time a student stay here, but last week he(she) has gone. My English is poor, I hope you can understand above.