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下列单词的三单形式和过去式： clean give invite learn open skate teach think visit turn

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2 | 2013-1-6 20:10:59 | 显示全部楼层 |阅读模式

三人称单数：cleans gives invites learns opens skates teachesthinks visits turns 过去式：clean-cleaned-cleaned
give-gave-given invite -invited- invited learn-learned/learnt-learned/learnt open-opened--opened skate-skated-skated teach -teached -teached
think-thought-thought
visit-visited-visited
turn-turned-turn...

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