1seguir + gerundo
continuation (kept doing)
2volver a + infinitivo
repetition
3dejar de + infinitivo
interuption (quit/stop)
4acabar de + infinitivo
recent past action (just did something)
5soler + infinitivo
generally, regularly
6ponerse a + infinitivo
start an action (started to do something)
7tener que + infinitivo
obligation (have to do something)
8estar + gerundio
action in progress (ando, iendo = ing)
9ir a + infinitivo
proposition for the future (going to do something)
10llevar + gerundo
has been doing something