用括号内所给的单词的正确形式填空 ____ you ever ___(swim) in the sea?---No,never.

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用括号内所给的单词的正确形式填空 ____ you ever ___(swim) in the sea?---No,never.
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用括号内所给的单词的正确形式填空 ____ you ever ___(swim) in the sea?---No,never.
用括号内所给的单词的正确形式填空 ____ you ever ___(swim) in the sea?---No,never.

用括号内所给的单词的正确形式填空 ____ you ever ___(swim) in the sea?---No,never.
Have ,swum
swim 是不规则动词,其过去式是swam ,过去分词是SWUM,而现在完成时的结构是have/ has +过去分词.

Have swimmed

Have , swum
swim 是不规则动词,过去式是swam ,过去分词是swum,而现在完成时的结构是have/ has +过去分词。