1) we shall go, shan't we?
2) let's go, shall we?
為什麼第二句不是let's go, shan't we?
是不是因為......
positive question tag: challenge
negative question tag: request for confirmation
更新1:
1) we shall go, shan't we? 2) let's go, shall we? 呢兩句是grammar書quote出來, 沒有錯. 我只想知道點解1)可以用shan't we, 但2)就唔可以