请问介词后面可以加宾语从句吗

请问介词后面可以加宾语从句吗

当然可以。介宾结构。
that引导宾语从句时，一般是可以进行省略的。但当that引导的宾语从句充当介词的宾语时，that不可以省略。例如：I doubt (that) he graduated from Oxford. The reason lies in that she works harder than the others do.
除此之外，that引导宾语从句还有两种情况不能省略：1. 当that 从句与另一名词性从句并列作宾语时，第二个that不能省：Everyone knew what happened and that she was worried.
2.用it做形式宾语的宾语从句。I think it cool that Sam swims in the winter.

可以的，名词从句不但可作及物动词的宾语，还可以作介词的宾语，下面有两例句：
Object to Preposition
Your success depends upon whether you have such determination.
（depend） upon 是介词
He speaks in accordance with how he was instructed.
（in accordance） with 是介词
供你参考。