but,however,and的英文用法,急!but,however可否用在句首?比如说（大侠们顺便看看有没有语法错误）:There used to be someone to whom I could love.There used to be someone to whom I could buy posies for. There used to be someone

but,however,and的英文用法,急!but,however可否用在句首?比如说（大侠们顺便看看有没有语法错误）:There used to be someone to whom I could love.There used to be someone to whom I could buy posies for. There used to be someone
but,however,and的英文用法,急!
but,however可否用在句首?
比如说（大侠们顺便看看有没有语法错误）:
There used to be someone to whom I could love.There used to be someone to whom I could buy posies for. There used to be someone to whom I could ask,"do you love me?"(在这里可否用And?)I'm sure that the answer would be yes.（这里可否用But?）Now there is no one, no one at all.
THX!

but,however,and的英文用法,急!but,however可否用在句首?比如说（大侠们顺便看看有没有语法错误）:There used to be someone to whom I could love.There used to be someone to whom I could buy posies for. There used to be someone
There used to be someone who I could have loved.
There used to be someone who I could have bought posies for.
There used to be someone who I could have asked 'Do you love me?'
I'm pretty sure that the answer would have been 'yes,I do' .
However / But now there is no one,no one at all.
But/However都表示转折,可以互换,However语气强一些.
用could have done形式表达更好一些,表示原本能够去做,但是实际上没有做.

有上下文，but however可以用在句首，这两个词的意思是一样的，但是用的时候，however后要加逗号。其他的不是很清楚。

but一般放在句首，后面不用逗号隔开，直接加句子；而however要用逗号隔开，后面再加句子
这两个词在语法上基本没有区别