Not ...at all的意思是一点也不.
not at all的意思是不客气.
at all 是到底的意思
举例子：He does not loo like his mother at all.他一点也不像他妈.
第二个是,比如人家给你说 Thank you,就可以回答,not at all.
第三个是,do you like him at all?你到底喜欢他吗? Not ...at all的意思是一点也不.
not at all的意思是不客气.
at all 是到底的意思
举例子：He does not loo like his mother at all.他一点也不像他妈.
第二个是,比如人家给你说 Thank you,就可以回答,not at all.
第三个是,do you like him at all?你到底喜欢他吗?