yesterday vs present perfect

[user_gary]

She has been in this forum for 5 hours yesterday.

I learned that we should use the word "yesterday" only with a simple past tense.
e.g. I received the document yesterday. [correct]
I have received the document yesterday. [wrong]

But in the highlighted sentence it has been used with present perfect tense.

So I am confused.

Could you help me on this?

[William Strunk Jr]

The present perfect refers to a state that exists in the present, not the past. If you refer to the past you need to use since or for. "She has been browsing the forum for a week" or "She has been browsing the forum since yesterday".

[2006]

She has been in this forum for 5 hours yesterday.

I learned that we should use the word "yesterday" only with a simple past tense.
e.g. I received the document yesterday. [correct]
I have received the document yesterday. [wrong]

But in the highlighted sentence it has been used with present perfect tense.

So I am confused.

Could you help me on this?

The highlighted sentence is not a good one. 'She was in this forum for 5 hours yesterday.' is correct.

"I have received the document yesterday." is wrong because it contains the totally useless word "have".