Ok, I saw explanation that:
- 我去了商店。（means: I have gone to the shop already）
- 我去商店了。（means: I am going to the shop now）
So I expected to meet 了 for the past tense only right after the verb:
But actually I saw that this is also possible:
So is it correct for the past tense to separate 了 with the verb? Is there any difference in meaning?