詢問一下有關英文tense 問題

I won't mix Present Perfect tense with Simple Past tense with the same context of describing events.

當一離開百貨公司個陣講, you can say:
I have just been to Apple Department Store. It is big. There are different kinds of products in the store.

In distant past, you can say:
I visited Apple Department Store (three months ago, last year, in 1997). It was big. There were different kinds of products in the store.

2015-03-19 02:40:06 補充：
typo: I won't mix Present Perfect tense with Simple Past tense "within" the same context of describing events.

句子的寫/講法除了文法結構之外，亦要考慮你說的用詞和用意的。
當你離開時講你"visit"其實無論文法或現實邏輯上"visit"都是過去發生了的"動作"，所以你用have visited(好像是想表達"剛去過")其實在英語表達的習慣上不會這樣講/寫，而是直接用過去式visited來表達"已經去完了"...接下去的內容你講在這"去完了的地方"情形用過去式便正確。

I visited Apple Department Store. It was big and there were different kinds of products in it.

修改連接和用一些可用代名詞(不用每句都話the department store).

Don't really get what you mean in chinese though.

By the time i left the apple department store, the first impression is big and there are different variety of goods.

應該沒有錯吧！我不知道