沒有固定的時態。因為during her lifetime可能是過去（結束了）也可能是現在（還沒結束），也可能是將來。看句子意義決定。
例子：（來自百度翻譯）
Say's writings reached a wide audience during his lifetime. 過去時
塞伊的作品在他有生之年就擁有了廣泛讀者。
來源：《柯林斯英漢雙解大詞典》
He suggested that the environment has changed during his lifetime.完成時
他表示，在他的壹生中，環境發生了變化。
My uncle accepted that Shaws belonged to me, but he would stay there during his lifetime. 過去將來時
我叔叔同意肖家大院歸我所有，但他要待在那兒度過余生。