我无法告诉你我有多么感激你的帮助。

___I ___can't ___tell ___you ___how grateful I am for your help.

我无法告诉你我对这次考试感到多么紧张。

___I ___can't ___tell ___you ___how nervous I am about the exam.

我无法告诉你再次见到我的家人我有多么高兴。

___I ___can't ___tell ___you ___how happy I was to see my family again.