tell me that是什么从句

是宾语从句，这是双宾语，that引导的从句做直接宾语，me做间接宾语

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. ⽼师告诉我们他想收回他说过的话。（……的话）

1． that 引导的宾语从句: that 没有意义，在口语或非正式文体中常省略

例如：

I really feel she’s making a mistake. 我的确感到她正犯错误。

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

Hearing that his son was badly wounded， he hurried to the hospital to see him.听说儿子受了重伤，他急忙赶到医院去看望他。

I suggested that we should go home. 我建议我们回家去。虚拟语气，that 一般不能省略。

2．whether/if (是否)引导的宾语从句：如果要突出“究竟是…还是不…”，常在whether 后面加or not if 一般不与or not连用。如：

He asked me if/whether I knew John. 他问我是否认识约翰。

Let me know whether you can e or not. 你能来还是不能来，告诉我一声。