used to or use to
I didn’t use to follow politics but I do now
I didn’t used to follow politics but I do now which is correct and why....or are they both correct?
6 Answers
¨Used to¨ (with the ´d´) is the correct form when positive, but without the d in the negative.
BUT,
we tend to use it only for things we did in the past, but NOT for things we didn´t do. In other words, it is usually used in the positive-affirmative, but not often in the negative.
Therefore, even your first choiced with ´use to´ doesn´t really quite work. It´s not technically incorrect, but it´s very clumsy sounding in English, and most of us would never use it.
Normally we would use regular, plain simple past for this.
I didn´t follow politics, but I do now
or with a bit more complexity, maybe using one of the 4 below
I didn´t follow politics (in the past - back then - when I was young - until now), but I do now
I hope that helps. ´Used to´ is a very special case, that is used for the past, but isn´t really a past tense. It´s sort of an odd construction, even though we use it, a LOT:
Again stressing the difference between positive and negative use, if the situation were reversed, it would sound perfectly normal to say
I used to follow politics, but now I don´t.
We just don´t use ´used to´ often to talk about things we didn´t do in the past. Only what we DID do.
Used to and didn't use to are only used to talk about past habits. There is no present form. To talk about present habits we can use the present simple. When using these structures there are often two parts to the sentence, something about the past and something about the present, for example:
I used to drive to work but now I go by car. I didn't use to like coffee but I love it now.
Used to / didn't use to When talking about things that we did in the past but don't do now we can use the expression used to. The negative form, to talk about things which we didn't do in the past but do now, is didn't use to.
The first is correct.
When talking about habitual things in the past that one no longer does anymore, "used to" is appropriate:
- I used to go shopping every friday.
- My mother used to pick me up from school.
- I used to play guitar.
When asking saying a sentence or asking a question with the words "did" or "didn't" included, "use to" is correct:
- Did you use to play tennis?
- Didn't you're uncle use to work in that building?
- I didn't use to speak so confidently.
- I didn’t use to follow politics, but I do now.
Another time when "used to" is used is when talking about what one is accustomed to:
- I'm used to taking cold showers.
- He's used to not having a lot of friends.
Hope this clears things up! 
The negative form ' used not to ' also exists, but is rather formal and old-fashioned. I don't think it is frequently used in Am. English, not even in writing.
The first one is correct. "I didn’t use to follow politics but I do now."
The second one is wrong becuase you use the word "used" when you talk about using an item. For exampled, I already used the bathroom... In your case you are not "using" anything and you didn't "use" anything. You simply "followed" something.
I know it can be tricky, but the correct answer is the 1st one.
I used to + infinitive = yo solía + infinitive
