✔ 最佳答案
一般性地表達 "你忍讓一下, 容許他喜歡怎樣就怎樣"
(Will you / Can you) let him have it his way?
一般性地表達 "你比較大, 你要容忍他"
(Will you / Can you) be a nice big brother?
而在有所指明的情況, 如二人爭玩具, 爭去廁所, 同如樓上所說, 講針對情況的話
(Will you / Can you) let your little brother go first?
(Will you / Can you) let your little brother play with it first?
在有所指明的情況加上一般的禮讓勸戒:
(Will you / Can you) be a nice big brother and let your little brother play first?