有現在完成式問題想問問

lol dustin creative ans

2015-06-23 14:15:05 補充：
'I watched television' is ok because the time is stated 'from 7:00-8:00'

'I have been watching' is also ok when you want to emphasize* that you have been watching TV for a long time! (an hour)

2015-06-23 14:16:34 補充：
simple past can be used when u stated the time

Better than u use 'have watched' as we usually use have watched when we don't know the time :)

hope it helps

是否用現在完成式，還要看你的上下文。

現在完成式和過去式用法上的一些分別如下：

過去式：
** 一件過去了的事件。
** 有明確的過去時間。

現在完成式：
** 雖然在過去發生，但重點在現在（這事件和現在的關連）
** 一般沒有確切的過去時間，但可以有 since a particular time， for a period of time

如果你用 現在完成式 (present perfect tense)，即
"I have watched television already."
重點是強調動作（即睇電視）至到說話的一刻已經完成了，效果持續到說話那一刻。

你也可以比較一下 "I did that" 和 "I have done that already" 都有少許意思上的不同。

文法本身沒有問題，反而是要看看你想表達什麼意思。

2015-06-27 08:27:05 補充：
Of course , 可以用 現在完成式

係八點零分零一秒: Bang!

係八點零分零三秒你會講: Ahhhhh....Wow!

係八點零分零五秒你會講: Help!

2015-06-24 01:05:02 補充：
Sorry to learn that "發問者 Karen" does not exist any more, probably because of the blast.

What a sad story!

Present perfect:-No Problem:-I've watched tv for (20:00-19:00=01:00 hr.)
Since the tv set go off with a bang@20:00:01(=exploded),I've watched tv for 1 hr.

In Oral presentation present result of past actions can use the present perfect due to subject inclined;influence to now;already-just