高一英语(改错)It was (not until) she (came to see) us that we (had known) her mother (was ill) in hospital.请写出错误的地方并改正,说明理由.

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高一英语(改错)It was (not until) she (came to see) us that we (had known) her mother (was ill) in hospital.请写出错误的地方并改正,说明理由.

高一英语(改错)It was (not until) she (came to see) us that we (had known) her mother (was ill) in hospital.请写出错误的地方并改正,说明理由.
高一英语(改错)
It was (not until) she (came to see) us that we (had known) her mother (was ill) in hospital.
请写出错误的地方并改正,说明理由.

高一英语(改错)It was (not until) she (came to see) us that we (had known) her mother (was ill) in hospital.请写出错误的地方并改正,说明理由.
C 应改为:knew
这是一个对时间状语从句进行强调的强调句,所叙述的一件发生在过去的事情,故主句中应用一般过去时,而不用过去完成时.