Mark did not know what he should do to help him.怎样改为同义句

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Markdidnotknowwhatheshoulddotohelphim.怎样改为同义句Markdidnotknowwhatheshoulddotohelphim.怎样改为同义句Markdidnot

Mark did not know what he should do to help him.怎样改为同义句
Mark did not know what he should do to help him.怎样改为同义句

Mark did not know what he should do to help him.怎样改为同义句
Mark did not know how to help him.