at all和in all的區別是什麽

1、at all ：完全，根本，多用於否定句，條件句。如用於肯定句，疑問句。可作 "真的，確實" 解。

Eg. If it were not for the sun，we could not live at all．

2、in all：總的來說，總之，壹***。

Eg.

There were twenty in all at the meeting. 會上***有二十人。

There were twelve of us in all for dinner.我們壹***十二個人吃飯。