The woman who invited to the meeting was my uant. The woman that was invited to the meeting was my uant. 哪句對 為什麼？

第二句（作為修飾語的形容詞子句用了被動態動詞was invited）比較正確，因為invite是「及物動詞」不能沒有受詞（第一句的invited沒有受詞。但兩個主要動詞宜用現在簡單式："is" my aunt。因為這是不隨時間變化的事實，除非my aunt已經過世了。

The women who invited you to the meeting is my aunt.
應為invited加上受詞。

The woman who (was )invited to the meeting was my aunt. =The woman that was invited to the ……=The woman invited to the ……以上三句皆可，惟本句主詞冗長有頭重腳輕之嫌，建議改成My aunt was the woman who was invited to ……

嚴格而兩句都不對：

1. The woman who invited to the meeting...用錯動詞的主動句式，the woman who invited...意思便是"這女人是(過去時態)主動邀請人來參加會議/會面，但句子後半部的意思沒有符合句式的受詞，沒有她邀請的是誰或其麼to the meeting。又或者她其實不是會議/會面的主持或主辦人。

2. The woman that was invited to the meeting這前句的文法和句式意思是這女人是被邀請來這會議/會面，但連接詞that則不對，因為她是"人"，所以應該是用who。

因此正確(或按這兩句的意思修正的話)句法應該是：
The woman who was invited to the meeting was my aunt.