TO on prepositio joissain verbirakenteissa (eikä TO-partikkeli infinitiivissä):

Saara Lilja used to smoke five cigarettes a day with her dogs. = Saara Lilja ennen poltti viisi savuketta koiriensa kera. (USED TO on aina IMPPERFEKTI)
1. Saara Lilja was used to smoking five cigarettes a day  with her dogs. = OLI TOTTUNUT POLTTAMAAN...
(to) be used to doing s-g
= (to) be accustomed to doing s-g
Saara Lilja was accustomed to smoking five cigarettes a day with her dogs.
2. (to) get used to doing s-g = tottua jhkn
I hope I will get used to getting up at 5 am.
We got used to getting up at 5 am.
3. (to) look forward to doing s-g = odottaa innokkaasti jotakin
I am looking forward to seeing you soon.
I look forward to hearing from you soon again.
4. (to) object to doing s-g
He objected to us smoking in his home. = Hän vastusti sitä, että tupakoimme hänen kodissaan.
5. (to) devote oneself / one's life to doing s-g = omistautua jhkn / omistaa elämänsä jllkn
Mother Theresa devoted herself / her life to helping the poor and the less fortunate in Kolkata (formerly known as Calcutta), India.