Which is correct: you use to write, or, you used to write?

used to write.

PnL is correct (as usual). It is ‘used to’.

Both of them are right.One is future and another is past

I thing so..

One is past tense: I used to write novels.

One is present tense and refers to an object: A pen is what I use to write my novels.

I think the reason that “use to write” is used so often (incorrectly for past tense) is because people are more accustomed to speaking than writing and want to write what they say. When speaking, the D and the T get smooshed together very easily, and people end up saying something more like “I use’ta write.” Then they forget that the D was ever there.

i used to write novels too.

good thing you axed this question.

That blue pen is what I use to write my letters.

I used to write in my journal daily, but I stopped.

“Use” in the present tense requires a direct object; viz; the blue pen.

“Used’ in the past tense does not. I used to jog; now I’m a lazy slug.

“I use milk in my tea; I used to use cream.”

This has nothing to do with present or past. AIUI the question is: are “use to” and “used to” both acceptable to indicate a past habitual action. I can’t find any sources that say they are both acceptable.

However Merriam-Webster’s Dictionary of English Usage, page 934, has this to say about the construction “did he used to” as opposed to “did he use to”

“In American English, such usage [“did he used to”] is considered an error, but some British commentators find it acceptable.

Nothing in question that mentions tenses, if you’ll recheck. Mamat asked only “Which is correct, etc.?”

What does AIUI mean?

AIUI=as I understand it. I was responding to some of the replies, which talk about present and past tense.

AHA, meaning “aha.” Thanks.