點解見到有人用i were u

其實I were you，係一個唔可以發生的事，你無可能變成另一個人la。

而I were you，都唔可以轉番去present tense。

而如果你要用if 係頭的話，其實都要轉為if I were you既。

I 是應該用 was.
而哩到係mean:
提出勸告時說的,而you係用were,這個連起用就這樣用if were you...

2007-06-08 13:09:56 補充：
轉過去式,because別人已經do 咗,所以轉埋過去式.if i was u,i will 係錯

I were you 如果我係你......

因我無可能是你，所以用were。impossible