It may help to have a pencil and paper ready to check claims and carry out experiments.
参考译文:准备好一支铅笔和纸来检查索赔并进行实验可能会有帮助。
It【主语】// may help 【谓语动词】to have a pencil and paper ready to check claims and carry out experiments【真正主语】
备注(1):第1个不定式短语to have a pencil and paper ready to check claims and carry out experiments为句子真正主语。
备注(2)第2个不定式短语to check claims and carry out experiments为句子目的状语。