单句改错!1.He ordered us not speak so loudly.2.Turn to the right

单句改错!
1.He ordered us not speak so loudly.
2.Turn to the right,you will find the post office.
3.I have been waiting you for a long time.
4.It is certain he will come.
5.I found strange that she had not come yet.
6.This is the classroom for us to study.
7.I really don’t know how to do.
8.You need not to go with me unless you are free now.
9.This book is too hard for me to read it
10.As he was careless,so he failed
11.I was too tired not to walk any further.