更正给定的句子的语法和语境错误。



Sentance: 我們明天去飲啤酒，這會很好。
Corrected sentence: 我們明天去喝啤酒，會很不錯。 

Explanation: 

The original sentence contains two errors in both grammar and context. 

- The verb "飲" should be replaced with "喝" as the latter is the correct term for "drink" in this context.
- The phrase "這會很好" is not idiomatic. It can be replaced with "會很不錯" meaning "will be very good".