没问翻译呀，but到底是介词还是连词( 二 ) _意为

3 but then = on the other hand，意为“不过；在另一方面” 。
例如：
London is a noisy place, but then it's also a place where you get the best entertainment
伦敦是个闹市，不过它也是能够给你最好娱乐的地方。
4 nothing but = only ，意为“只；不过是” 。
例如：
We could see nothing but water
我们只能看见水。
5 not ?but ?意为“不是??而是??” ，连接两个并列的名词、形容词、副词、短语或分句等。
例如：
My bag is not black but red
我的书包不是黑色的而是红色的。
He failed not because he isn't clever but because he didn't work hard
他失败了，不是因为他不
聪明而是因为他工作不努力。
6 no ?but 意为“没有??不??”;虽然，尽管。
例如：
No child but likes Old Li in our village
没有孩子不喜欢我们村里的老李。
I can’t marry her, no but we love each other very much
我不能娶她，尽管我们彼此非常相爱
7 not only ? but also ?意为“不但??而且??；既??又??”，连接两个并列成分。
例如：
Not only you but also she has to attend the meeting
不但你而且她也得参加这次会议。
He not only teaches us English but also does other things for us
他不但教我们英语，而且还为我们干别的事情。
8 not that ?but that ?意为“不是因为??而是因为??” 。
例如：
Not that the car is out of order, but that I've not learned to drive
不是汽车出了故障，而是我还
没有学会开车。
9 can't help but do ?意为“不能不??；忍不住??” 。
例如：
I can't help but cry
我忍不住哭了。
10 all but 意为“除??外全都，几乎” 。
例如：
All but mother in my family can speak English
除母亲外，我的一家人都会说英语。
His theory is all but correct
他的理论几乎是正确的。
11 anything but 意为“不见得，决不” 。
例如：
He is anything but a good headmaster
他不见得是个好校长。
This car is anything but beautiful
这辆小汽车根本不漂亮。
12 but now 意为“刚刚，适才” 。
例如：
I saw him in the office but now
我刚刚看见他在办公室。
I heard the commander talk about you but now
适才听得司令讲到您。
13 can (or could) but 意为“只能，只好” 。
例如：
His father can but know a few letters
他的父亲只能认几个字母。
The old lady could but walk slowly with a stick
那个老太太只能拄着拐杖慢慢地朝前走。
14 can (or could) not but 意为“不得不，忍不住” 。
例如：
I could not but tell him about it