youxiaxiaolala

I created a short story use  these expression. But I'm not sure whether it is suitable in the sentences,please help me to correct it.Thank you !

“Let me alone!",she said. "let me off !why do you always  let me down? I can't support it!
He has nothing to say and let her go. "let up for a minutes, maybe she is very tired."He said  to himself and then  let out a slight sign .