沒有動詞的句子

The more expensive the hotel, the better the service.

這句子沒有動詞，是否較常出現於口語？可否用於正式書面中？
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要知道句法總有例外, 這就是其中之一

這是比較句, 即使沒有動詞, 仍然是合乎語法的

因此, 這並非在口語中比較常見, 在書寫上也是常用的

The more expensive hotel has the better service.

先談談，在一般的情況裏，the more......the more，均需要動詞，如：

The more she learns, the more she wants to learn.
The harder he worked, the more he got.

但若句子的意思是明顯，特別是慣用語上，則可以將動詞省略（特別是verb to be)

如： The more , the better.多多益善。　　The sooner, the better. 越早越好。

而你的句子，也是有所省略，句子可看為
The more expensive the hotel (is), the better the service (is).

希望幫到你！

I agree with 小草; Ken has the best answer.

"The more expensive the hotel, the better the service" is a form of "textual ellipsis", which is defined as: "omitting something that has already been mentioned, or when what is missing is clearly recoverable from the text."

2013-05-14 10:25:15 補充：
Continued from above:

The original sentence is: "The more expensive the hotel is, the better the service will be".
Similar sentences with the verb(s) omitted are:
"the sooner, the better".
"the more, the merrier".

2013-05-14 10:30:39 補充：
This kind of sentences are commonly used (some are idioms), and are acceptable in formal written English.

這不是句子。
英文稱為"sentence fragment"，不是完整的句子，所以不應有句號。
用口語無問題，因為語法是完全正確，但書面中就不能加句號。

例如可以說：we chose this hotel because the more expensive the hotel, the better the service.

樓上的那一位：
more is an adjective, not a verb.

2013-05-15 21:13:20 補充：
they can be used in language as idioms, but they are NOT sentences!!! try typing it on microsoft Word, it will be identified as an error

Ken 的答案最合理

： 沒有動詞的句子
較常出現於口語 不用於正式書面中

The more expensive the hotel, the better the service
It is slogan not a proper sentence to attract people's attention.

more就係動詞，否則如何expensive﹖