关于“邀请”的英语高级词组，综合多个权威来源整理如下：
一、核心表达
extend invitation
指主动发出邀请，强调邀请者的主动性和诚意。例如：
"We would be honored to extend an invitation to you for the upcoming conference."
extend an invitation
与extend invitation结构相同，但需加定冠词"an"，用于元音音素开头的单词"invitation"。例如：
"She extended an invitation to all her colleagues to join the project."
二、扩展表达
extend a formal invitation
明确指出邀请的性质为正式场合。例如：
"We are extending a formal invitation to you to participate in the gala event."
extend a personal invitation
用于私人场合的邀请。例如：
"He extended a personal invitation to my family for the holiday."
extend a cordial invitation
表达热情友好的邀请。例如：
"The organization extended a cordial invitation to all members of the community."
extend an invitation to...for...
说明邀请对象和目的。例如：
"We extended an invitation to all students for the science fair."
三、搭配与注意事项
邀请函写作时可使用以下词组：
"It is with great pleasure that we extend..."
"We cordially invite you to..."
注意时态搭配：
现在时：We invite you to...
过去时：We invited you to...
完成时：We have invited you to...
通过以上表达，既能体现邀请的正式性，又能根据具体场合调整语气和格式。
温馨提示：
