何が問題なんですか？って英語でなんて言うの？

Any of these statements will suffice. You may always request further explanation if appropriate.

the example features firstly, you excusing yourself (pardon me) in case you are interrupting the class.Then you state that you are not understanding what is presently being said, We know its what is in the present, because you have said ''I am having trouble''.

It's always good to start these kinds of clarifications with an apology so that it's clear that you would like their attention and that you are being polite. If there's something "wrong," it means that there's a problem. I hope that this helps. :)

When we say "I'm sorry but I don't follow you" this is a way of portraying that you are not understanding the person you are communicating with. It doesn't mean literally that you are following the person, it is an idiomatic phrase. "In other words" lets the person know that what you have just said is a little difficult to understand so it would be better if you explained the issue or the confusion in another way, maybe using smaller and simpler words depending on the person's level of the language or the subject

1.I am sorry,could you please explain it to me again. - This is a polite way to say ask the teacher to try and explain to you in a simpler way. 2.I am sorry I don't understand. - This is way to say that what the teacher said to wasn't clear enough and you would like them to repeat to you in a simpler way.

When we " don't get something" it means it has not registered with our brain ;-D And we remain in a "state of counfusion" or "have a lack of understanding" regarding some data that is being presented to us... We can say ..."I am sorry, can you explain further?...I just don't get it!"

Both of these are clear ways of letting your teacher know that you don't understand the mistake. Beginning with "Sorry," is polite, and immediately lets your teacher know, you don't understand. It is not so much an apology, but more of a way of saying "What was that?" or "Come again?" (Could you please say that agin.) Then, simply state "I'm missing the error." or "I'm not sure I see where the mistake ocurs." If you'd like, you can also say "Could you explain it more?" to be sure that your teacher gives you a clearer explanation. **This is a great question, because you should always let your teacher know when you don't understand something. Best way to learn!

I still don't understand why it is wrong. By using this sentence you are not disagreeing with your teacher you are just explaining that you are confused and need the teacher to be clearer in their explanation. You can add the second sentence to the first sentence and say; I still don't understand why it is wrong. Can you explain again please, but be a bit clearer? By joining these two sentences together you are telling your teacher you don't understand and what him or her to make it easier for you to understand. It is the teacher's job to find a way for you to understand. Go over your head - this is an English idiom. It basically means that something is a bit complicated, or difficult, and you don't understand. e.g. Maths and Science go over my head. I am saying that I have always found maths and science difficult and I don't understand it. I hope you understand this explanation and it doesn't go over your head :)