on your desk????

have put 現在完成式(present perfect tense)

put嘅過去式+過去分詞都係put,shut,cut都係咁

結構:has/have+過去分詞(多數+ed)

用法:
1e+之前發生嘅事,啱啱
例:I have put the file on your desk.
2同另1件事比較早發生嘅
例: I have eaten an apple before I have dinner.
3以前發生,到e+都做緊.
例:I have studied since 1999.

提示字:
冇指定時間先可以用:recently, just, yet,since,before, after,from
有指定時間嘅唔應該用:last xx, yesterday,in the morning/afternoon, on one day, in the past

2009-12-18 08:25:46 補充：
我意思係:有yersterday, last xx,in the past指定時間嘅字,就唔用完成式have put,要用過去式.

飯前/飯後 有誤會:
I have eaten an apply [ before ] I have dinner. 是 飯前果.
I have eaten an apply [ after ] I have dinner. 是飯後果.