important verbs

to have just

acabar de

to begin

comenzar

to realise

darse cuenta (de)

to stop (doing something)

dejar de

to throw

echar

to become

hacerse

one must

hay que

to happen

ocurrir

to spend (time)

pasar

to start doing something

ponerse a

to know (knowledge)

saber

to regularly do something

soler

to take place

tener lugar

to have to do something

tener que

to do (something) again

volver a

to become

volverse