四级时态练习(讲解、练习、答案).docVIP

四级时态练习(讲解、练习、答案) 四级时态练习(讲解、练习、答案) PAGE PAGEPAGE 12 四级时态练习(讲解、练习、答案) 一．时态（.修改） 英语中共有16种时态，我们并不一一赘述。这里我们只讲容易用错的、也是经常出现在试卷上的时态方面的问题。只要同学们掌握了我们所讲的知识就能会做题，做对题。 Ⅰ.“现在时”中应注意的几个问题 1. 如果说的是将来的事，主句用将来时，状语从句用现在时。状语从句常由以下连词引导：if, in case, when, as, as soon as before, until, unless, who(what/ when/ where…)ever, no matter who(what/ when/ where…), etc. ① If he comes, I’ll give it to him. ② I’ll stay here until he promises to do as I ask. ③ You won’t pass the exam unless you work hard. ④ I’ll begin the dictation when you are ready. ⑤ No matter where you go, you’ll find Coca-Cola. ⑥ No matter how much it costs, I’ll buy it. （第1. 2. 3. 4. 5. 6.题） *几个特殊的副词、名词短语也可引导状语从句，所用时态同上。 the moment immediately the minute = as soon as instantly = as soon as the instant directly every time = whenever/ no matter when the next time = next time when each time ① The children are to do their homework the moment they arrive back from school. ② The machine starts the minute the button is pressed. ③ Tell me immediately you have any news. ④ Please be sure to telephone me the next time you come. (第7. 8.题) 1）如果强调从句动作在先，主句动作在后时，从句可用完成时。（既从句动作发成之后，才开始主句的动作。） ① When he has sold all the newspapers, he’ll go home. ② The postman cannot reach the house until the snow has melted. 2）now that从句常表示已经发生的动作，在从句动作已经发生的前提下才开始主句的动作，故该从句常用完成时。 ① Now that the rain has stopped, lets go at once. ② Now that you’ve got a chance, you might as well make full use of it. （第9. 10.题） 3）如果if条件从句出现if sb. will/ would…,表示意愿，“如果某人愿意…”will、would是情态动词。 ① If you will take off your clothes, we will fit the new clothes on you. 如果你愿意脱掉身上的衣服，我们就把新衣服给你穿上。 （从句的will是情态动词，主句的will是助动词，表将来时） ② If you will only do this, you may find out why people are dissatisfied and understand the revolution that is threatening France. 只有你肯这样做，你就会发现老百姓为什麽会不满意，你就会理解正在威胁着法国的革命。 4）if、when引导的宾语从句表达将来的动作时，要用将来时。 ① I can’t tell you if it’ll rain tomorro