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一般疑问句：
have/has
pp
Study the examples and complete the table.
过去分词
haven't/hasn't
pp
把have 和has 提到句首
moved-moved
studied-studied
shopped-shopped
Speak out their past forms(过去式) and
past participles(过去分词）as quickly as possible.
regular
verbs
(规则动词)
一般+ed
以e结尾+d
重读闭音
双写 +ed
辅+y变 i + ed
5.read-
6.become-
7.begin-
8.buy-
read - read
became- become
began- begun
bought-bought
irregular