doing singing studing having running watching
does sings studies has runs watches
did sung studied had ran watched
do.sing.study.have.run.watch单词的现在分词.第三人称单数.过去式
do.sing.study.have.run.watch单词的现在分词.第三人称单数.过去式
英语人气:647 ℃时间:2019-08-17 01:15:59
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