An interrogative sentence asks a question
The typical English question is "What's up?"

You just Raise the intonation of the end of the sentence, when you ask a question.

Like this?
Yeah, but don't scream.

Oh!
In English, add "Do" or "Does" in front of the verb.

*Question mark is often omitted in Japanese.

Now that you've learned the interrogative sentence, you can have basic conversations in Japanese or English!
A: Do you eat?
B: I eat.

How is it?
It's simple, isn't it?
They are similar to each other.