Let us call her 语法错误吗

Let us call her 语法错误吗 Let us go have fun 这句话有语法错误吗? 请问：Let us call it a day, Let's call her.(同义句) let us maintain the status quo.请问这句话有语法错误吗? Let us call he.的同义句是什么 After she (到达）her hometown,she will call us she is very kind to us and always asks us to call her by her Let us love her husband so please continue let it go 有语法错误吗? let's party 有语法错误吗? Let us call it a day.And _____ I would like to thank you all