手紙には返事を書かなきゃいけないよ。の英語

You must reply to that letter.

You have to reply to the letter.

You have no reply to letters.

You needn't answer the letter.

You don't need to answer that letter.

It isn't necessary to answer that letter.

There is no need to reply to that letter.

There's no need to reply to that letter.

Don't put off answering the letter.

Remember to answer his letter.

Don't forget to answer the letter.

Don't put off answering the letter.

You need not answer the letter.

Don't put off answering the letter.

I have some correspondence to deal with.

I make a point of writing an answer as soon as I get a letter.

I have to write a letter.

I must catch up on answering my mail.

If you can not write the letter, I will write it for you.

You need not wait for an answer.

I have written to him, and expect to hear from him very soon.

Remember to answer his letter.

Please don't forget to post the letter.

Please don't forget to mail this letter.

You must sometimes write to me.

Don't forget to post the letter, please.

I have letters I need to write.

You must write an answer at once at the letter.

You must respond at once to the letter.

He has not answered my letter.