5．如果主句谓语动词为各种现在时或一般将来时.则间接引语中的动词仍保持直接引语原来时态.如果主句谓语动词为过去时.间接引语中的动词时态按下列变化: (1) 一般现在时变为一般过去时 (2) 现在进——青夏教育精英家教网—

5．如果主句谓语动词为各种现在时或一般将来时.则间接引语中的动词仍保持直接引语原来时态.如果主句谓语动词为过去时.间接引语中的动词时态按下列变化: (1) 一般现在时变为一般过去时 (2) 现在进行时变为过去进行时 (3) 一般将来时变为过去将来时 (4) 现在完成时变为过去完成时 (5) 一般过去时变为过去完成时 (6) 过去完成时不变.仍为过去完成时 [注意] (1) 如果直接引语是表示客观真理时.变为间接引语.一般现在时不改为一般过去时.如: The teacher said "The earth goes round the sun." →The teacher said that the earth goes round the sun. (2) 如果直接引语中有明确表示过时间的状语.变为间接引语时.一般过去时不改为过去完成时.如: He said to me, "I was born in 1973." →He told me that he was born in 1973. (3)如果直接引语所述事实在当时和目前同样生效.变为间接宾语时.一般现在时不改为一般过去时.如: He said, "I'm a boy, not a girl." →He said that he is a boy ,not a girl. (4)如果直接引语中的谓语动词表示一种反复出现或习惯动作.在变为间接引时.一般现在时不改为一般过去时.如: The girl said, "I get up at six every morning." →The girl said that she gets up at six every morning. (5)如果直接引语中含有since, when, while 引导的表示过去时间的状语从句.在变为间接引语时.只改变主句中的谓语动词.从句的一般过去时则不变.如: He said to me, "I have taught English since he came here ." →He told me that he had taught English since he came here. (6)如果直接引语中含有情态动词 must, need, had better以及情态动词的过去式could, might, should, would,在变为间接引语时.这些情态动词没有时态的改变.例如: The teacher said to me . "You must pay more attention to your pronunciation." →The teacher told me that I must pay more attention to my pronunciation. He said , "I could swim when I was only six ." →He said that he could swim when he was only six. 【查看更多】

题目列表(包括答案和解析)

乳制品按行业质量标准分成五个等级，等级系数X依次为1，2，3，4，5。现从一批该乳制品中随机抽取20件，对其等级系数进行统计分析，得到频率分布表如下：