Registor: The letter should be written in a formal and polite manner.Tone: The letter should not have a tone which suggest demands, rudeness or shouting e.t.c
The register and tone should be appropriate according to the relationship you have with the recipient and the purpose of the letter.
The letter should have be polite and have appropriate language no matter who it is.If it is a formal letter you should not demand anything and should ask politely while in informal it is according to the relationship with the other person
The letter should always have a polite way of addressing and writing in both formal and informal letter writing. The content of both way of letter writing is based on the current situations. The letter should bring out the emotions that the writer wishes to bring out to the receiver.
The letter should have proper salutation (Mr, Ms etc.) and should be serious and at the same time polite. The tone should be courteous and not contain any tinge of rudeness. The tone and register should be tailored to the context and purpose.
The letter should be written in a formal and very polite way as this was the letter was written to a teacher who is a higher authority. There should not be any element of rudeness in this letter and it should not have a very demanding tone.
The tone should be serious, and polite, and not come across as demanding or condescending. Language should be appropriate, and there should be no grammatical errors
The register should be formal and polite. It should not be demanding or rude in any way.
The register should be formal and the tone should be polite and have appropriate greetings and use of language as a formal letter is most of the time written to people of a higher authority .
The letter should be written in a former and polite way. It should not be rude and demanding.
I expect to tone to bear a form of respect (not condescending tones) and language befit my status as a teacher. If the letter was rude, I will not accept whatever he is asking and just throw it out of the window.
THe language used should be formal, without any slang or abbreviations. The tone used should be polite.
Grammar should be perfect, tone formal.
And also no slang allowed.