A foreign friend of mine asked me the following questions and I cannot explain to him very well. So I am looking for help here.
I said to him: it's ok to say a sentence in different word order, let's say,
But he questioned: Isn't there any difference?
I considered and said yes, and made up 3 scenes for each one:
comment: Here is a plain question on whether I paid for (anything) yesterday.
comment: Here the toll collector is definite that I haven't paid parking fee for yesterday, and he is not very happy, and he is asking for it. So I do not answer whether I paid yesterday but say sorry.
comment: Here the landlady is furious, and she doesn't care whether or not the poor guy will make up the room rate, and all she want to do is get rid of him.
I said each of the sentence is the best choice under these circumstances, thus not exchangeable (if we want to express the emotion of each character).
He asked if there is a guideline to understand these sentences and how to compose a sentence in best word order. I answered something but felt it not very well-rounded.
Arh so I post this question on almighty forum~