英语的过去式要如何掌握?

英语的过去式要如何掌握?

性质和特点：
动词的过去式用于一般进行时的句子中,表示过去的动作或状态.一般过去时通常带有表示过去时间状语的词,词组或从句.如 yesterday,the day before last,last week,two days ago,when I waked up 等.
词形变化：
1、在动词后面加ed（如果单词末尾是一个不发音的e,则只加d).如：work--worked,move--moved,play--played,start--started,need--needed.
2、以辅音字母 + y结尾的动词,把y变为i 再加ed,如：study--studied try--tried
3、以一个辅音字母结尾的重读闭音节动词,双写这个辅音字母,再加 ed,如：stop--stopped,drag--dragged,drop--dropped
4、不规则动词的过去式.这须多加记忆.如：go - went,make - made,am/is--was,are--were
ed的读音：
1.在清辅音后读作[t].如：asked,helped,watched,stopped
2.在浊辅音和元音后读作[d].如：enjoyed,studied,moved,called
3.在t / d后读作[id].如：wanted,needed
不规则动词的记忆法：
1.以t结尾的词,过去式与原形相同.如：put—put,let—let,cut—cut,beat—beat
2.以d结尾的词,把d变成t.如:build—built,lend—lent,send—sent,spend—spent
3.以n结尾的词,在词后加t.如：mean—meant,burn—burnt,learn—learnt
4.以ow / aw结尾的词,把ow / aw变成ew.如：blow—blew,draw—drew,know—knew,grow—grew
5.含有双写字母的词,将双写改为单写,在词尾加t.如：keep—kept,sleep—slept,feel—felt,smell—smelt
6.含有元音字母o / i的词,将o / i变成a.如：sing—sang,give—gave,sit—sat,drink—drank
含有be动词的一般过去时用法举例：
肯定句：I was late yesterday.
否定句：I wasn't late yesterday.
一般疑问句：Were you late yesterday?
肯定回答：Yes,I was.
否定回答：No,I wasn't.
特殊疑问词：Why were you late yesterday?
只含有实义动词的一般过去时用法举例：
肯定句：I drew a nice picture yesterday.
否定句：I didn't draw a nice picture yesterday.（实义动词不像be动词那样能带not,所以只能借助动词did.）
一般疑问句：Did you draw a nice picture yesterday?（问句需要谓语部分有一个词提到主语前面.而实义动词不像be动词那样能提前,所以只能借助动词did.特殊疑问句也是这样.）
肯定回答：Yes,I did.
否定回答：No,I didn't.
特殊疑问句：When did you draw a nice picture?