标准学案 九年级(上)·历史 动词三单的变化规则 1.一般情况下,直接加-s,如:cook-cooks, milk-milks 2.以s. x. sh. ch. o结尾,加-es,如:guess-guesses, wash-washes, watch-watches, go-goes 3.以“辅音字母+y”结尾,变y为i, 再加-es,如:study-studies be动词的过去式为was, were;行为动词的过去式有规则变化和不规则变化两种,规则变化有以下几种情况: 1)直接在动词原形末尾加-ed. e.g. work-----worked; ask------asked; 2)以e结尾的动词只加-d. e.g. arrive-----arrived; like-----liked. 3)末尾只有一个辅音字母的重读闭音节,应先双写这个辅音字母,再加-ed. e.g. shop-----shopped; 4)以"辅音字母+y"结尾的动词,先把y变成i,再加-ed. e.g. carry----carried; study------studied. 有些动词变过去式是不规则的,e.g. fly------flew; break-----broke; teach-----taught. 这些需要像生单词一样记住. 现在分词的构成: 例词 原形 现在分词 一般动词+ ing work working 现在分词构成规则 第 1 页 标准学案 九年级(上)·历史 visit visiting study studying 以e结尾的动词,去come coming 掉e+ ing live living leave leaving 以重读闭音节或rstop stopping 音节结尾的动词,末尾只有一个辅音字begin beginning 母的词,要双写这个swim swimming 辅音字母+ing get getting refer referring 以ie结尾的重读开die 音节动词改ie为y+ing tie tying dying 第 2 页 本文来源:https://www.wddqw.com/doc/375e4005ff4733687e21af45b307e87101f6f8dd.html