前一个polluted为过去分词,属定语从句中的谓语,后一个为过去式,属主句的谓语.句意为:曾被污染的那条河污染了另一条河。

The river which had been polluted polluted another one.

youdao

比如“write”一词，有该词的原形的“write”、第三人称单数的“writes”、过去式的“wrote”以及过去分词的“written”。 是把它们算为4个单词呢，还是算为1个单词？

Should “write”, “writes”, “wrote”, “written” count as four words or one?

youdao

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.

youdao

写出动词的过去式和过去分词形式。

Give the past and past participle forms of the verbs.

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附录里有常用不规则动词的过去式和过去分词转换形式。

What is attached is past tense change for irregular vebs bast .

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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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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.

youdao

写出下列动词的过去式及过去分词。

Change these verbs into past verbs and perfect verbs.

youdao

学习每个动词的所有形式可谓是非常累的，特别是那些恐怖的不规则过去分词和过去式。

Learning all forms for every verb can be exhausting, especially for the dreaded imperfect or simple past.

youdao

学习每个动词的所有形式可谓是非常累的，特别是那些恐怖的不规则过去分词和过去式。

Learning all forms for every verb can be exhausting, especially for the dreaded imperfect or simple past.

youdao