To be used to doing something
This usage of used to means that something existed or repeatedly happened in the past but does not exist or happen now
I used to walk to school every day when I was a child
Taking a few of your examples: The second one is correct, and this is why: used to means that the person originally had whatever characteristic was being described, but no longer has it
Use of used to do
I used to get up at 6am to go to school
People used to think the earth was flat and the sun revolved around the earth
* Water is used for putting out fires
In Spanish, the imperfect tense is expressed by an inflection of the verb or by the verb soler
Some used to examples include: Used to has another meaning
When the statement is positive, as in the reader’s example, the expression is used to
Used to (Soler) Usamos el verbo modal “used to” para indicar algo que ocurría o sucedía en el pasado de manera habitual
Exams should always accept any correct answer unless a particular form is specified or excluded in the rubric
Mi padre solía jugar al golf con el patriarca, Giles