“我舍不得”用英语怎么说？
“舍不得”的英文表达是：Can't bear to 不忍心，不舍得

例句：

Time flies. I can't bear to leave you. 

时间过的好快啊，我真舍不得离开你。

I can't bear to see you cry. 

我真舍不得你哭。
“敷衍”用英语怎么说？
“敷衍”的英文表达是：Perfunctory。

例句：

His smile was perfunctory. 

他的笑容很敷衍。 

They only made a perfunctory effort. 

他们只是敷衍了事。

“随便”用英语怎么说？
“ 随便”的英文表达一般有以下几种：

例句：

I have no idea how to file my tax return, whatever. 

我完全不知道该怎么报税，唉，随便啦。

You don't want to join the club? Oh well, suit yourself.

你不愿意参加俱乐部是吗? 好吧，随你的便吧。（很无奈的说法）

Whatever you think is fine with me. 

你要是这么想，我也没办法。（无所谓的态度）

So if you really want this class to make a difference in your life, it's up to you. 

所以如果你真的想通过这门课改变生活，一切取决于你。

I have no doubt about that. You can always do whatever you want. 

我并不置疑这件事，你想做的事去做就好了。