we have never seen 【 such an 】exciting film before.请问such an 可以换为so such用来修饰可数名词单数形式时,可以与冠词连用.不知so行不?

we have never seen 【 such an 】exciting film before=we have never seen so exciting a film before. 一般是这样的搭配

可以的，但是so前面要加形容词不能直接与冠词连用，结构是这样的：so + adj. + a(n) + n
我是老师，有问题可以交流~

你好,在这个句子中不能.但可能变为以下的句子:
We have never seen so exciting a film before.

不能换，要么直接用SO

such是突出名词的,而so是强调形容词的,故so an...是错误的.
比较：1.We have never seen such an exciting film before.
2.We have never seen so exciting a film before.

不可以，因为
such a/ an +形容词+单数可数名词；
so +形容词+a/an+单数名词。

可以，但顺序要改一下
We have never seen so exciting a film before.
such+a(an)+形容 词＋名词
so+形容词＋a(an)＋名词.