创作编号：GB8878185555334563BT9125XW 创作者： 凤呜大王* 现在完成时的定义： 1. 表示过去发生或已经完成的某一动作对现在造成的影响或结果 e.g. –Have you had your lunch yet? –Yes, I have. I’ve just had it. (现在我不饿了。) 2. 表示动作或状态从过去某一时刻开始，一直延续到现在，而且可能还要继续下去。 e.g. I haven’t seen her these days. I’ve known Bob for three years. I’ve been at this school for over two years. 现在完成时的构成： 主语+have/has +动词的过去分词. 否定：have, has后面加not 一般疑问句：have, has提到主语前 用法要点： 1.现在完成时往往同表示不确定的过去时间状语连用 already(肯定句中)，yet(否定，疑问，句末)，just, before, recently, still, lately, never等: 现在完成时常用短语 up to now /till now, so far Up to/till now he's read many story books. 至今他已读过好多故事书。 I've been to New York three times so far. 至今我已到纽约去过三次。 has gone (to),has been (to),has been (in) 的区别。 has gone to:表示某人已去了某地，而没有回来(去了没回)(不可与 for+一段时间 连用) has been to :表示去过某地(去过已回来)(不可与 for+一段时间 连用) has been in/at(in表示相对大一些的地点;at表示相对小一些的地点):表示一直呆在某地， 常与时间段搭配 since+时间点=for+时间段since+一般过去时态的时间状语从句=since+时间点+ago 动词过去式和过去分词的变化相同 规则变化： 1. 一般在动词词尾直接ed. 如：pick → picked → picked; wish → wished → wished; stay → stayed → stayed A-A-A: let → let → let; put → put → put; read → read → read, cut→cut→cut A-B-B: lend → lent → lent; build → built → built; send → sent → sent buy → bought → bought; bring → brought → brought; catch → caught → caught; teach → taught → taught A-B-C: choose→chose→chosen do→did→done see→saw→seen drink→drank→drunk go→went→gone take→took→taken A-B-A: run→ran→run come→came→come 创作编号：GB8878185555334563BT9125XW 创作者： 凤呜大王* 本文来源：https://www.wddqw.com/doc/fa7025a457270722192e453610661ed9ac515579.html