求助英语高手帮我分析一下下面的句子是否有语法错误.

求职信 job application letter
感谢信 letter for thanks
邀请信 invitation letter
道歉信 letter for applogize\
祝贺信 letter for greeting
辞职信 letter for resignation
建议信 letter for suggestion/proposal
投诉信 complainment letter
推荐信 recommandation letter
请求信 letter for help/assistance
模板没有问题,看过了.