题目内容：

the grand theatre in shanghai is open to visitors during the daytime _______
there is a performance going on 为什么用expect when 而不用expect

优质解答

expect 意思 期望

追问：

..打错了 是except

追答：

when 当。。。。的时候 expect when there is a performance going on 用when 才构成一个从句 若没有when，except 后面应该跟个名词。如下例句 i have many friends except you。我除你之外还有很多朋友。