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2022-09-03
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进行时的构成进行时的用法要点解读 一、进行时的构成 现在进行时由“am/is/are＋现在分词”构成；过去进行时由“was/were＋现在分词”构成；将来进行时由“will/shall＋be＋现在分词”构成。现在分词的变化规则如下： 变化规则 例词 一般情况在词尾直接加ing ask→asking 以不发音的e结尾的 动词，去e再加ing write→writing take→taking face→facing 以重读闭音节结尾，且末尾 只有一个辅音字母，双写该 辅音字母再加ing cut→cutting begin→beginning swim→swimming
高中英语单词表3500词必背 变ie为y再加ing lie→lying die→dying 二、进行时的用法 1．现在进行时 (1)表示说话时正在进行或表示现阶段正在进行的动作，虽然此时此刻该动作不一定正在进行。 —I hear you are working in a pub.What's it like? ——我听说你在酒吧工作。感觉怎么样？ —Well，it's very hard work and I'm always tired，but I don't mind. ——哦，工作很辛苦，我也总是很累，不过我不介意。 (2)表示按计划或安排即将发生的动作，常用于go，come，leave，start，arrive，return，work，sleep，stay，have，wear，run out等动词。 Food supplies in the floodstricken area are running out.We must act immediately before there's none left.洪灾区的食物供给快要用完了。我们必须在食物吃完前马上行动。 2．过去进行时 (1)表示过去某一时刻或某一段时间内正在进行的动作，常同表示过去的时间状语从句以及at that time，at that moment，at this time yesterday，at ten o'clock yesterday等连用。 He must have sensed that I was looking at him.He suddenly glanced at me and said quietly，“Why are you staring at me like that？” 他一定感觉到了我正在看他。他突然瞥了我一眼，轻声地说：“你为什么那样盯着我看？” (2)表示过去的两个动作中持续进行的一个，常与when，while引导的时间状语从句连用。 Jack was working in the lab when the power cut occurred. 突然断电时，杰克正在实验室里工作。 3．将来进行时 表示将来某一时刻或某一时间段正在发生或进行的动作，常与一些表示将来的时间状语连用，如：at this time tomorrow，by then，from 1：30 to 4：30 tomorrow等。 Jane can't attend the meeting at 3 o'clock this afternoon because she will be teaching a class at that time. 简不能参加今天下午三点的会议了，因为她那个时间在授课。 Ⅰ.单句语法填空 1．(2020·枣庄模拟)Engineers are setting(set) up over 15，000 sensors (传感器) nationwide and wiring them into a web. 2．(2020·玉溪押题卷)At this time tomorrow we will be flying (fly) over the Atlantic Ocean. 3．(2020·长治一中模拟)Shirley was writing (write) a book about China last year but I don't know whether she has finished it. 4．(2020·浙江湖州期末考试) Hurry up! Mr. Johnson is expecting(expect) you in his office. Ⅱ.单句改错 5．(2020·长沙模拟)I am glad to hear that you are going to Canada to study. So I was writing to tell you something about this country. was→am 6．(2020·湖北省黄冈市高三模拟)My essay has been sending to you along with this email. I hope it won't cause you too much trouble. sending→sent 
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