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以不发音的e结尾的动词加-d
hope
live
结尾是“辅音字母+y”的动词，先变“y”为“ i”再加-ed
study
worry
末尾只有一个辅音字母的重读闭音节词，先双写这个辅音字母，再加-ed
stop
trip
规则动词过去式的构成
口诀：一加ed，二加d，y要变成ied
四要双写加ed, 特殊形式特殊记。
worked
played
hoped
lived
stopped
tripped
studied
worried
1 Write more verbs and their past forms
in each group.
climb-climbed
arrive-arrived
study-studied
pick-picked
milk-milked
play-played
stay-stayed
want-wanted