tell me that是什麼從句

是賓語從句，這是雙賓語，that引導的從句做直接賓語，me做間接賓語

如:

Our teacher told us that the earth goes around the sun.

The teacher told us he wanted to take back what he had said. ⽼師告訴我們他想收回他説過的話。（……的話）

1． that 引導的賓語從句: that 沒有意義，在口語或非正式文體中常省略

例如：

I really feel she’s making a mistake. 我的確感到她正犯錯誤。

James said (that) he was feeling better. 詹姆斯説他感到好些了。

Hearing that his son was badly wounded， he hurried to the hospital to see him.聽説兒子受了重傷，他急忙趕到醫院去看望他。

I suggested that we should go home. 我建議我們回家去。虛擬語氣，that 一般不能省略。

2．whether/if (是否)引導的賓語從句：如果要突出“究竟是…還是不…”，常在whether 後面加or not if 一般不與or not連用。如：

He asked me if/whether I knew John. 他問我是否認識約翰。

Let me know whether you can e or not. 你能來還是不能來，告訴我一聲。