請問這個題目要怎麼做： if May (stay) up late ，she (feel) tired the next tomorrow.?

If May stays up late, she will feel tired the next morning.

不太明白要做甚麼題目，只是推測是選用正確的動詞時態修改。

If May got up late and would feel very tired in next morning. Yip

If ,conjunction,is used to say that one thing can, will or might happen, and be true.No such term as the next tomorrow, but the just "tomorrow" term or the next day term.We've chosen the "the next day" term here.
feel---to feel tired, a synonym for tired, an adj.----hence might feel tired as modal verb group.
If May stay(s)---For the Simple present Tnse for 3rd person singular He, She=May, It , you would add a (s) to verb stay(s)=stays.
Expression:-If May stays up late, she might feel tired the next day.