The old lady looked as if she ______(be) ill for a long time.

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问题 The old lady looked as if she ______(be) ill for a long time.

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答案had been

解析 在as if, as though引导的方式状语从句中,要用虚拟语气:用过去时表示与现在事实相反或对现在情况有所怀疑;用过去完成时表示与过去事实相反。
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