"Just joined" OR "Have just joined"

Hi Picnic:

They are different tenses of the verb join.

I just joined the forums. - Past tense.
I have just joined the forums. - Present perfect tense.

Yes, okey but what is the difference between them?

The difference between present perfect and past tense has been answered many times in the Forums. Here is a good thread to read:



You also will find it in any English grammar book.

Regards,
A-

So its correct to say I have written a letter, right? because I have written it, but I dont tell him when.
?

Yes, that is correct. You can use a time period with have , but not a specific time.

Here are some examples:

I have written a letter, but I have not mailed it yet.
I wrote the letter yesterday and mailed it today.

I have written this company at least three complaint letters in the past month, but they haven't replied to any of them.

Yay!!
Correct!

thank you so much