Therefore,thus (英文較好的入)

首先, therefore同thus.
一般來說,therefore同thus都通用.但嚴格來說,therefore是用於logical嘅前因同後果.好像中文的(因此). thus就用在事情的始末,好像中文的(在這情形下/因為這個情形). thus是較為old English的用法. 你的例子用therefore較合適.
peter is laughed by tom;he therefore,upset feeling.
peter is laughed by tom;he thus,upset feeling.
兩句都唔係好通.
先不理tense,這樣較好:
Peter is laughed by Tom;therefore he has upset feeling.
或
Peter is laughed by Tom; therefore he feels upset.

peter is laughed by tom;Thus,he was upset.
前半段是原因,後半段是結果.原因比結果更早發生,冇理由結果是past tense而原因會是present tense.
全件事已發生,所以應是past tense.
Peter was laughed by Tom; therefore he was upset.



2009-12-24 23:14:03 補充：
可以,但唔係咁用.首先,你需要一個verb. upset feeling不是verb. 放開therefore, he upset feeling就不對了.
如果你寫成
Peter was laughed by Tom; he therefore, was upset. 都可以,但一般是寫成
Peter was laughed by Tom and he therefore was upset.
or
Peter was laughed by Tom and he therefore had upset feeling.