i regret to tell you this,but...

i regret to tell you this,but...
i regret to tell you this,but i broke the window.
为什么要用but.
还有一个.
it's hard work climbing mountains.
it's hard work后加doing

1.but表示转折呀 ,句子翻译过来是我很抱歉但我不得不说,是我打碎了窗户.
2.it's hard work后加doing sth是可以的,也能加动词不定式,it's hard work to do something

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息