for all 最基本含义意为“为所有的…”，是一个介词短语，介词短语可作定语或状语，例如：
We haven't found a home for all our books yet.
我们还没找到存放全部书籍的地方。
There's plenty room for all of you!
这里有足够的地方容纳你们所有的人。
I was not prepared for all the problems it caused.
我对这事引起的诸多麻烦毫无防备。
I didn't get a red cent for all my work.
我做了那么多工作，可什么也没得到。
These are trying times for all of us.
对我们所有人来说，这是最难熬的时期。
It was a stressful time for all of us.
对我们所有人来说，那是一个艰难的时期。
Social events and training days are arranged for all the staff.
为所有员工安排了联谊活动和培训日。
There was food enough for all.
所有人都有足够的食物。
How can we make room for all the furniture?
我们怎么腾得出地方放这些家具呢？《牛津高阶英汉双解词典》
I am deeply indebted to my family for all their help.
我深深感激我的家人给我的所有帮助。
Lastly, I would like to thank my parents for all their support.
最后，我想感谢父母对我的全力支持。
Thank you for all your help.
感谢你的一切帮助。
I need to have it out with her once and for all.
我有必要跟她公开彻底地把话说清楚。
We need to settle this once and for all.
我们需要把这事一次解决。
但是for all 还有一些很特殊的用法：
（一）、for all，意为“尽管，虽然”，表示让步后面接名词或名词短语，相当于 despite 或 in spite of或with all，例如：
For/With all his boasting and ostentatious training, he was knocked out in the first round.
尽管他受过夸张招摇的训练，但是他在第一回合就被击倒了。
For all her money, Mrs. Hooper isn’t happy.
胡佛夫人尽管很有钱，但是不幸福。
I love her for all her faults.
尽管她有这么多缺点，我还是爱她。
The system, for all its faults, is the best available at the moment.
这个系统虽然缺点不少，却是现有最好的一个。
You may still succeed, for all your shortcomings.
尽管你有缺点，你还是可以成功的。
For all his efforts, he didn’t succeed.
尽管他作了一切努力，但是仍未成功。
For all its clarity of style, the book is not easy reading.
这本书虽然文体清晰，但读起来并不容易。
For all his confident talk, he is actually very unsure of himself.
尽管他自信满满，但实际上他对自己很不自信。
She still loves him, for all his faults.
尽管他有种种缺点，她仍然爱他。
He won't give up for all the repeated failures.
尽管不停的失败，他不会放弃的。
For all his confident talk, he is actually very unsure of himself.
尽管他自信满满，但实际上他对自己很不自信。
For all his wealth , I do not like him .
尽管他很有钱，我还是不喜欢他。
For all his wealth, he was not happy.
尽管他很有钱，他并不快乐。
She may come in late, for all his preparation.
尽管他有防备，她还是可能会迟到。
He is a poor musician for all his training.
尽管他经过了很多的`训练, 他还是个蹩脚的乐师。
I wouldn't like to be in his position, for all his wealth.
尽管他很有钱, 我怎么也不愿意处于他那个位置。
For all her faults, Mary’s friends tolerated and even adored her.
尽管玛丽有缺点, 她的朋友们还是宽容她, 甚至崇拜她。
（二）、for all，表强调，相当于一个连词，常用于 for all I know 或 for all I care 组合中
（1）. for all I know，表达的是否定的意思，用来表达某人不确定或只知道一点点细节，因此通常对某人不重要、无价值或无所谓，意为“某人可不知道“，在翻译时要引起注意，例如：
She could be dead for all I know.
她说不定已经死了。
For all I know she's still living in Boston.
据我所知她还住在波士顿。
For all I know she's gone to China.
据我所知，她去了中国。
（2）. for all I care，也表达否定的意思，意为”我才不管或在乎“，不要翻译成“对于我所在乎的一切”，例如：
You can do what you like, for all I care.
你想干什么就可以干什么，我才不管呢。
You can go right now for all I care.
你可以马上走，我才不在乎呢。
He can buy ten houses for all I care.
他能买十栋房子，我不在乎。
You can do what you like, for all I care.
你想干什么就可以干什么，我才不管呢。
You can go right now for all I care.
你可以马上走，我才不在乎呢。
You may succeed, for all I care.
你可能会成功，我才不在乎。
I could be dead for all he cares!
我是死是活，他才不关心呢！
for all后面跟的成分是什么就可以确定是什么用法；若是名词或名词短语，则意为“尽管，虽然”；若是 I care 或 I know，则意为“我才不在乎”或“我可不知道或据我所知”，例如：
You may still succeed, for all your shortcomings.
尽管你有缺点，你还是可以成功的。
You may succeed, for all I care.
你可能会成功，我才不在乎。
She may come in late, for all I care.
我才不关心她可能迟到不迟到。
2.all for (尽管有不同意见或实际困难)完全赞成,坚信;想尽一切办法做某事
I'm all for people having fun.
我完全赞成人们尽情享乐。
They're all for saving money where they can.
他们想尽一切办法省钱。
I was all for it, but Wolfe said no.
我对此完全赞成，但是乌尔夫说不行。
He is all for players earning what they can while they are in the game.
他完全赞成现役运动员尽可能多赚钱。
I'm all for accepting the offer.
我极其赞成接受该项提议。
I'm all for it.
我举双手赞成。