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!