Hi,
Before take them up with you, I'll introduce them.
You know different stress paterns give different meaning and logic position.
for example:
thyself thy foe
[thyself]------it is the derivation of [thy foe], so ,[thyself]given a stress song.
No pain no gain.
[no pain]-----it is the derivation of [no gain], so [no pain]given a stress song.
Happy birthday.
[birthday]-----it is the derivation of

, so [birthday]given a stree song.
Welcome to Taiwan.
[to Taiwan]----it is the derivation of [welcome], so [to Taiwan]given a stress dong.
Now I have some question about that, I don't know which is which.
And ask for the right answer to any native speaker. I need your help to know which is to give a stress sound.
1. Who is that? It is her.
Is [that] the derivation of [who]? and Is [that] given a stree sound?2. Where is he?
Is [he] the derivation of [where]? and is [he] given a stress sound?3. I show you which one you want / you should give me.
[which one] and [you want], I don't know which is which.Does different verbs give cause for different result or not?4. Which one do you want?
Is this sentence the same as the above?Does an affirmative sentence or interrogative sentence concern the giving of a stress soun5. A straw will show which way the wind blows.
[which way] and [the wind blows], I don't know which is which.6. To whom it may concern
[to whom] and [it may concern], I don't know which is which.Thank you for your assistance.