"我的忍耐是有限制的" 英语怎么说?

I only knew I am an average person, I endure patiently have the limit

我受不了了(I cannotted bear)

我只知道我是个普通人,我的忍耐是有限制的:
I 'm a common person and there is a limit of my toleration.
I know I am only an ordinary person and my patients are limited.
我受不了了!:
I can't bear/stand any more.

i know that i'm only an ordinary man and my patients are limited.
i cannot not bear it any more!

I just know i am a everyman.My endurance is very limitary.
I can't bear/stand.

My knows I am a common run of people, my endurance has restriction" how to say? Thanks
The problem add:"I can not stand!" How to say?