举举例子跟过去时怎么分辨呢

3个回答

  • 现在完成时(Present perfect)过去发生并且已经完成的动作对现在造成影响或后果,过去某一时间开始并一直持续到现在并且有可能还会持续的动作或状态.

    基本构成:主语+have/has+动词的过去分词

    ①肯定句中:主语+have/has+动词的过去分词+宾语

    ②否定句中:主语+Haven't/Hasn't+动词的过去分词+宾语

    ③一般疑问句中:Have/Has+主语+动词的过去分词+宾语.

    ④特殊疑问句中:特殊疑问词或词组+一般疑问句 have/has+主语+过去分词+其他

    过去式是英语语法的一种,表示过去某个时间里发生的动作或状态.一般过去式的动词通常用动词的过去式形式来表示,而动词的过去式是在动词原形的基础上变化的.动词的过去式可分为规则动词和不规则动词.

    过去时态结构基本形式

    1,主语+动词过去式+其他;

    2,be 动词用 was / were,

    3,构成 :

    ⑴ be→was— ( am, is 的过去式 ) were— ( are 的过去式 )

    ⑵ ( 动词过去式 )

    (1)一般情况下,动词词尾加 ed ,如:

    work—worked; play—played;want— wanted; act—acted

    (2)以不发音的 e 结尾动词,动词词尾加 d,如:

    live—lived; move—moved; decide—decided; decline—declined; hope—hoped;

    (3)以辅音字母 + y结尾的动词,把y变为i 再加ed,如:

    studied tried copied justified cried carried embodied emptied

    (4)以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加 ed,如:

    stopped begged fretted dragged dropped planned dotted dripped

    (5)注:不规则动词的过去式变化规律性不强,须多加记忆.

    go - went,make - made,get - got ,buy - bought ,come - came ,fly-flew ,is/am-was,are-were ,see-saw,bring-brought,do-did,teach-taught, think-thought, say-said,sit-sat. read-read, spend-spent, eat-ate,give-gave,tell-told,write-wrote,feel-felt,find-found,hear-heard,know-knew,

    put-put,grow-grew,take-took,catch-caught,come-came,become-became,swim-swam,sweep—swept,sing—sang,draw—drew,