Question

never/ in/ had/ river/ Jack/ the/ swum/ because/ of /he/ afraid/ was/ water.

Answer 1

Ответ:

Jack had never swam in the river because he was afraid of water.

Объяснение:

В слове swum ошибка есть. Там будет не swum, а swam

Answer 2

Jack had never swam in the river because he was afraid of water.

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swam - в этом случае ставится swam, потому что это не Present Perfect или другое.