never having done还是having never done

never having done还是having never done not having done 还是having not done? 现在分词的否定式现在分词作状语时never的位置?nver haveing done 还是having never do Having been done ,done,having done having been done 和 done 翻译:You'll never praise him too much for Ms having done so ma having done ,和 doing having done 做主语 Not having done 关于having done having done & doing having done 与doing