お風呂上りなので、すっぴんでごめんなさいって英語でなんて言うの？

You can open with the apology "Sorry", as it's something you feel bad about and want the other person to know that it was not intentional. By saying "I didn't have the chance" you are explaining that you were in a rush to get ready and ran out of time. In general, it may be considered a bit too personal to announce to a teacher that you just came out of the shower or bath, but if you have a good friendly relationship it's totally fine to say so, as in example 2.

"I'm sorry for not wearing makeup today, teacher. I just got out of the shower and didn't have time to put it on." This is great way to express that you were in a rush and just got out of the bath, so you were unable to put on makeup. It is also apologetic and casual, so you can use this anytime with your teacher. You are under no obligation to put on makeup for your lessons, so your teacher will always forgive you! Therefore, there is no express need for a formal way to say this. Example: You: "I'm sorry for not wearing makeup today, teacher. I just got out of the shower and didn't have time to put it on." Teacher: "No worries! That's perfectly fine. Let's get started with our lesson!" "Sorry! I didn't have a chance to put on my makeup today because I just got out of the bath." This is similar to the previous expression, but it's a bit more informal. You might use this sentence instead of the previous one if you have seen the teacher many times before during lessons. Example: You: "Sorry! I didn't have a chance to put on my makeup today because I just got out of the bath." Teacher: "That's just fine! It doesn't matter at all!" "I apologize for my appearance! I just got out of the bath/shower and didn't have time for putting on makeup." As mentioned before, you don't have to be very formal with your teacher, but this is a formal sentence. This is a way to express that you are apologetic about how you look and that you have a reason for looking the way you do. You might use with a teacher that you are meeting for the first time, or if you like to speak or practice formal English during your lessons. Example: You: "I apologize for my appearance! I just got out of the bath/shower and didn't have time for putting on makeup." Teacher: "It's no problem at all! However, if you feel uncomfortable with your appearance, you are always free to turn off your webcam."

A good way to apologize is to use the word "sorry." You can use this word to ask to be excused for any situation. Then, you can explain that the reason you are not wearing makeup is that you just took a shower and did not have time to put any on. To say, "I did not have chance," is to say that you were in a rush and did not have time to do something.

I'm sorry I didn't have time to put on any make up because I just got out of the shower You start by apologizing to the teacher for not putting on any make up. You then go on to explain why could not put on any makeup. You could also say please forgive me I did not get a chance to put on any make up. By saying this, you are still apologizing first and also highlight what you are apologizing for.

"I don't have makeup on" = This gives a simply explains your current state. "Embarrassed" = This means to be shameful about something and to feel shy about something. Example: I am so embarrassed about falling down in front of all my friends. Example: I am embarrassed about wearing this ugly shoes! "I just took a bath and I don't have makeup on". = This explains the action you took and why you are not feeling comfortable. You can also say: *I just took a bath and I don't have makeup and feel embarrassed*