问题补充:
单选题Oh,itsyou,ImsorryI____knowyou____here.A.don , areB.didn , areC.didn ,wereD.don , were
答案:
C解析时态的呼应,有一些从句,特别是在宾语从句中,谓语动词的时态经常受主句谓语动词时态的影响。说话人必须使之一致,如:I did not know you were here。本来you were here 该用you are here。但由于受did not know的影响,就要用you were here。这种现象就叫时态的呼应,如下列句子:He told us that he would go abroad.他告诉我们他要出国。