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It is going to rain. We are going to have a meeting today. 2)“be to + 动词原形” 表示按计划进行或征求对方意见。 The boy is to go to school tomorrow. Are we to go on with this work? 3) “be about to + 动词原形” 表示即将发生的动作，意为 be ready to do sth. 后面一般不跟时间状语。 We are about to leave. 4) go , come , start, move, sail, leave, arrive ,stay 等可用进行时态表示按计划即将发生的动作。I’m leaving for Beijing. 5) 某些动词(如come, go ,leave, arrive, start, get , stay 等)的一般现在时也可表示将来。 The meeting starts at five o’clock. He gets off at the next stop. 4.现在进行时的用法 1) 现在进行时表示现在正在进行的动作，由“to be + 现在分词” 构成。另外， “系动词 + 介词或副词” 也表示进行时的意义。What are you doing? The bridge is under construction. 2) 表示感觉、愿望和状态的某些动词(如have, be , here, se, like 等 ) 一般不用进行。 5.过去进行时的用法 1) 过去进行时过去某一时刻、某一阶段正进行的动作，由 “ was (were) + 现在分词”构成。 In 1980 he was studying in a university. He was reading a novel when I came in. 6.现在完成时的用法现在完成时由 “have + 过去分词其使用有两种情况： 1) 现在完成时所表示的动作在说话之前已完成，但对现在有影响。句中没有具体时间状语。 He has gone to Fuzhou. He has been to Fuzhou. 2) 现在完成时所表示的动作开始于过去，持续到现在，也许还会持续下去常用 for 和since表示一段时间的状语或so far , now, today, this wek (month, year ) 等表示包括现在内的状语。 He has studied English for 5 years. He has studied English since 1985. Now I have finished the work.. 注意：表示短暂时间动作的词(如come, go , die, marry, buy 等)的完成时不能与for, since 等 表示一般时间的词连用。 3)现在完成进行时还可用时间和条件状语从句中，表示将来某时完成的动作。 I’ll go o your home when I have finished my homework. If it has stopped snowing in the morning, we’ll go to the park. (责任编辑：admin) |