Do/Does
verb-ing
singular
plural
Did and verb-ed
Solía
Was/were and verb-ing
when
cuando
mientras
uncontable
uncontable
questions and negative
uncontable
contable
suficiente
-er, more- , better
the -est, the monst -, the farthest
as - adjetive - as
sera
if + subj. + present simple, subj. + will/ won't + infinitive