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. . work-----worked; ask------asked; 2）以e结尾的动词只加-d. . 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. . shop-----shopped; 。 4)以"辅音字母+y"结尾的动词,先把y变成i,再加-ed. . carry----carried; study------studied. 有些动词变过去式是不规则的,. 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 现在分词构成规则 原形 现在分词 % work working 一般动词+ ing visit visiting study studying 以e结尾的动词，去come 掉e+ ing " live coming leave living 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 辅音字母+ing get swimming refer getting referring 以ie结尾的重读开die 音节动词改ie为y+ing tie tying dying 本文来源：https://www.wddqw.com/doc/a58c327d3386bceb19e8b8f67c1cfad6195fe9a4.html