mahattan chapter six 里的一个习题
指出画线的修饰词修饰对象，并判断修饰是否正确。
People that are well-informed know that Bordeaux is a French region whose most
famous export is the wine which bears its name.
此句修改后的正确的答案是
Well-informed people know that Bordeaux is a French region whose most famous
export is the wine that bears its name.
第一处的修改我明白，第二处把which改成that有些疑问
mahattan的解释：
Which bears its name: INCORRECT. The context of this sentence calls for an essential clause to
modify the wine, since the point of the clause is to identify the wine. If the sentence ended
with the wine, it would be incomplete. The clause should therefore begin with that rather than
which.
如果按essential和non-essential modifier来判断的话，
Use WHICH (and commas) if the modifier is non-essential.
Use THAT (and no commas) if the modifier is essential.
上面红色的句子意思是说：当逗号和which一起出现的时候是non-essential. 例如： This mansion, WHICH HAS BEEN RECENTLY PAINTED RED, is owned by the tees.
还是只要which出现修饰名词，他就是non-essential modifier.
有点小疑问。。。麻烦大家了。。
This mansion, WHICH HAS BEEN RECENTLY PAINTED RED, is owned by the tees.
还是只要which出现修饰名词，他就是non-essential modifier.
有点小疑问。。。麻烦大家了。。
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