stand，sing，give，eat，dtink，tell，know的过去式和过去分词是什么 原型 过去式 过去分词stand stood stoodsing sang sunggive gave giveneat ate eatendrink drank drunktell told toldkonw knew known
求以下动词的过去式和过去分词 过去式 过去分词be was\\were beengo went gonecome came comehear heard heardsee saw seeneat ate eaten find found foundbuy buoght boughtbring brought broughttake took takenmake made madesing sang sungring.
sing的过去式和过去分词是什么 过去式和过去分词构成法1）英语中大部分动词都以加-ed词尾的办法构成过去式及过去分词：现在时（动词原形）过去式 过去分词work worked workedappear appeared appearedtalk talked talkedplay played played这类动词称为规则动词（Regular Verbs）。2）在加-ed 词尾时要注意几个问题：a．若末尾已有字母e，则只加-d：live—lived please—pleased free—freedb．若以“辅音（字母）＋y”结尾，先变y为i再加-ed：try—tried study—studied simplify—simplifiedc．若是以“一个元音字母＋一个辅音字母”结尾，该音节又重读者，末尾字母要双写，然后再加-ed：stop—stopped fit—fitted chat—chattedd．其他的词都直接加-ed：lack—lacked open—opened repeat—repeated3）另外，还有几点值得注意：a．以“一个元音＋l”结尾的词，英国人都把l双写，美国人都不双写：travel—travelled(英)，traveled(美)marvel—marvelled(美)，marveled(美)b．l前若有两个元音，l一概不双写（英美都如此）：reveal—revealled appeal—appealedc．有少数词，尽管末尾音节并不重读，末尾辅音字母在英国仍双写：worship—worshipped(英)，worshiped(美)kidnap。
