今言った言葉が聞き取れなかったのでもう一度言って下さいって英語でなんて言うの？

When you couldn't hear / get / understand a certain word, you want to tell your teacher that you couldn't hear / get / understand a word and want to say it again.

"I didn't hear that word, would you mind saying that again?" says that you were not able to hear what a person said and want them to repeat it.

In these variations on possible responses, we include linguistic politeness. Apologising at the beginning of your question also acknowledges that you may have interrupted your teacher in the middle of their sentence and/or line of thought. You want to acknowledge that your intention is not to be rude, but you really don't understand and would appreciate help! These expressions may be especially useful in new teacher / student relationships, when you are part of a big class and need to to shout for help or when the setting is quite formal.

"Pardon me" is another way of saying I'm sorry. It is always polite to include pardon me when you feel you are disrupting the flow of the conversation and need to get someone's attention. "Would you mind" is a polite manner of speaking when asking for something, it can be used in various situations, for example "Would you mind passing me the salt" or "would you mind getting me a glass of water". "I didn't quite catch that" also means I didn't hear what you said.

It does happen sometimes that a teacher may say a word that a student is not familiar with or may pronounce it in an unfamiliar way prompting the student to request a 'repeat' of the word. The verb to 'repeat' as used in the second and third statements means 'to do or say something again'. If someone doesn't 'quite hear' what has been said, it means that the word was not audible enough for someone to make sense of it. In such a case, any student will be prompted to ask the teacher to repeat the word. So, if this was the case with you, you could have requested the teacher as follows: I didn't get what you just said, please say it again teacher. or Will you please repeat what you just said because I didn't get it. or I didn't quite hear what you've just said. Please repeat it for me.

Each of these versions of the question ask the same thing but in a different manor. Each asks the teacher to provide the word or sentence again so you can understand it better. The first can be used for anything that you need to have clarified. Whether that be a word or a phrase. This sentence can also be used in general conversation if you did not hear what the person said because of outside noise. The second sentence is specific for asking for a certain word you missed. This lets the teacher know that you missed a word in a sentence. This is helpful when a teacher uses a word you might not recognize and you need to understand or hear the word again. The last sentence is used to get clarity of a word or phrase to make sure that you have understood the phrase or word exactly. When you say "I couldn't catch it" this tells the teacher that you missed part of what he or she was saying and that you would like them to say the sentence again.

When you want to ask your teacher to repeat a word you did not hear or understand; then you may ask in the following ways: -I couldn't understand/hear that word. Could you please say it again? -There's a word I did not not understand when you were speaking. Can you please repeat what you were saying?