Istillremembertheforcefulhandgrabbingmetightly.
Istillrememberthehand,whosepowerfulandholdingmetightly可不可以啊!
首先,whose在这里的用法有点模糊,它是个物主代词,谁的什么?这种用法不太清晰,可以改成:Istillrememberthehand,thepowerfulhandthatheldmetightly.或Istillrememberthehandwhichwaspowfulandheldmetightly.供参考!