吃完晚饭后,他们沿着河边散了步。

吃完晚饭后,他们沿着河边散了步。

After having eaten dinner, they took a walk along the river.

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After having eaten dinner, they took a walk along the river.

After 引导非限定从属从句;having eaten 是完成体的 -ing 形式,表示吃晚饭在先、散步在后,eat 的不规则过去分词 eaten 也是本结构常见用法。

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