all of them expected there___more practice before the performanceto be having beenwhy?

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all of them expected there___more practice before the performanceto be having beenwhy?
all of them expected there___more practice before the performance
to be having been
why?

all of them expected there___more practice before the performanceto be having beenwhy?
to be
expect to do sth.
他们都希望演出前可以有更多练习机会.
1L误.

having been
to be 肯定不对，因为是过去的expected。故用完成时。

同意楼上, 应该是to be.
expect to do sth.是个固定词组, 是期待做某事的意思
having been用在这里从语法到意思都不对

选to be，expect 。。。to do。。。是固定搭配。没有expect。。。。doing。。。，应熟记

应该是to be,是由expect sb to do sth的结构决定的。期待有。。。expect there to be...

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