Why are the word orders of the questions wrong and in what way I can ask the same question (rephrase)?
- To what tense I can refer this sentence?
- To whom I can give an apple?
In interrogative questions, an auxiliary verb precedes the subject. It's called subject-auxiliary inversion(or subject-operator inversion if you follow LGSWE).
So it should be
To what tense can I refer this sentence?
To whom can I give an apple?
Those contructions are rather formal, the casual way to rephrase it is
What tense can I refer this sentence to?
Who can I give an apple to?