Question

it was so nice day that we went for

1．It was _____ that we went for a picnic in the country.
A．such nice a day B．such nice day
C．so nice a day D．so nice day
答案选的是C,为什么?选项里的so such怎么区分?

Answer 1

so副词,意思是“如此、这样”,后面常接形容词或副词；such形容词,意思是“如此、这样”,修饰名词,即可接可数名词,也可以接不可数名词.例如：
It’s such a fine day.
It’s so fine a day.
从上面两例可以看出：
such修饰单数可数名词时,不定冠词a/an通常放在such之后紧挨着；而so则不同,不定冠词位置不同.其结构分别为：
such a/ an +形容词+单数可数名词；
so +形容词+a/an+单数名词.
such除了修饰单数可数名词外,还可以修饰复数名词和不可数名词,so是副词,修饰形容词或副词.
如果复数名词前有few,many等形容词；不可数名词前有little,much等形容词,就必须用so,而不能用such,例如：
The camel had such a long neck.骆驼长着那样长的脖子.
Don’t make so much noise!别那么大声嚷嚷.