买的过去式和过去的购买过去分词。

Bought is the past tense and past participle of buy.

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今天下午，她学习了十五个动词以及它们的过去式和过去分词。

She studied fifteen verbs about their past tense and past participle this afternoon.

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家庭作业，预习下一课单词和动词的过去式。

Here is your homework, preview the new words and the past form of verbs.

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过去式和过去分词的构成方法。

Past tense and past participle of the composition method.

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巩固规则动词过去式的变化和用法，回顾本课童话故事的开头。

Fill in the blanks according to the passage of the beginning of the story.

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巩固规则动词过去式的变化和用法，回顾本课童话故事的开头。

Fill in the blanks according to the passage of the beginning of the story.

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