Not at all是什么意思？

一点也不
I don't like English at all
我一点也不喜欢英语

一、根本不，完全不，一点也不；
二、[客套语]没什么，别客气，哪儿话，不用谢 (= [美国英语]You're welcome.)
例句：
They were all of one mind on this subject.
在这个问题上他们的意见完全一致。
1.He felt himself at last absolutely free.
1.他觉得自己终於完全自由了。
2.I didn't want to be associated with it at all.
2.我根本不想与这事有牵连。
3.That hotel doesn't rate five stars at all.
3.那家旅馆根本够不上五星级。

not at all的意思是“一点也不”，是否定句强调的一种方法。
强调否定句的时候，可以把否定字放在句首引起的倒装，或者用not at all、by no means来表示强调，如：
Never again will we make such a mistake.
Never does he go to school late.
Never is he late for school.
The dress doesn't suit her at all.
By no means is English an easy language.
By no means am I a thief.