1.两个或两个人以上同时说时：
stick together through thick and thin 此说法如谚语一般
Dolly Parton有一首歌叫：Through Thick And Thin,里面Cause we've promised to stick together through thick and thin.We've promised to stick together that's what we're gonna do.意思是：我们发誓（已经许诺）要同甘共苦,我们发誓要同心协力作我们要做的.
2.一个人与另一个人之间时：下面几个说法比较通俗
A share A's troubles and joys with B (A与B同甘同苦/A与B分享悲伤喜欢：B是承受方,承受A的喜怒哀乐)
I (can) share my troubles and joys with her.我可以和她同甘共苦.（我能把我的悲伤和喜欢告诉她的意思）
A take A's share in B's troubles and joys.（A愿与B同感共苦/A愿意与B分享悲伤与喜悦：A是承受方,承受着B的喜怒哀乐）
He takes his share in my troubles and joys.他愿意分享我的不快乐和快乐.（他愿意听我诉苦的意思）
等等.（用“承受”那个词感觉不太恰当,同甘共苦何提“承受”呢.就当方便理解吧）