問題詳情：
![改錯：Circumstancespermit,hewouldnothavecancelledthetriphe...]( "改錯：Circumstancespermit,hewouldnothavecancelledthetriphe...")
改錯：Circumstances permit, he would not have cancelled the trip he had been longing for.
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【回答】
permit→permitting 句意：如果情況允許的話，他就不會取消他一直渴望的旅行了。這裏用“名詞＋現在分詞”構成*主格結構，相當於If circumstances permit。
知識點：非謂語動詞
題型：短文改錯
