怎么把单词变为过去式，一般规则有哪些?

Question

要说得简单一些，别忘了举例子。（例子举一两个就行）
如：
1····················································
2····················································
3····················································
4····················································
······················································
回答好加分哦！

Answer 1

规则变化在原单词末尾加d或ed 不规则的有：1、中间去e末尾加t，如：
keep→kept，feel→felt，sleep→slept，sweep→swept

2、结尾d变t，如：

build→built，lend→lent，send→sent，spend→spent

3、遇见i改为a，如：

ring→rang，sit→sat，drink→drank，sing→sang，swim→swam，begin→began，give→gave

4、“骑（马）”“开（车）”“写（字）”——把i变o

如：ride→rode，drive→drove，write→wrote

5、“想”“买”“带来”“打仗”——ought换上，如：think→thought，buy→bought，bring→brought，fight→fought

6、“教书”“抓住”——aught切莫忘，如：

teach→taught，carry→caught

7、ow/aw改为ew是新时尚，如：

know→knew，grow→grew，throw→threw，draw→drew

8、“放”“让”“读”过去式与原形一个样，如：put→put，let→let，read→read/red/
请及时采纳！谢谢！

Answer 2

1、后缀ed 如：play-played
2、后缀d 如：phone-phoned
3、中间去e后缀t 如：sleep-slept
4、结尾d变t 如：build-built
5、把i改成a 如：sit-sat
6、骑、驾驶、写字 i变o 如：ride-rode
7、想、买、带来、打仗 换ought 如：buy-bought
8、教书、抓住 换aught 如：teach-taught
9、ow/aw改为ew 如：draw-drew know-knew
10、put、cut、let、read、hurt不变
11、do-did go-went fly-flew break-broke run-ran eat-ate drink-drank wear-wore see-saw am/is-was are-were have/has-had make-made take-took say-said learn-learnt/learned
不规则动词，要单记

Answer 3

be+V-ed