Past Participles
to go
gone
shows ability
can
tall
taller
introduces first action
after
present perfect declarative
subject + has/have + past participle + finisher.
to know
known
shows permission or chance
may
disgusting
more disgusting
introduces second action
before
past perfect interrogative
Had + subject +past participle + finisher?
to make
made
shows possibility or chance
might
healthy
healthier
also introduces first action
since
modal negative
subject + modal + not + verb + finisher.
to bring
brought
shows requirement
must
expensive
more expensive
introduces actions from same time (longer answer)
while
past perfect negative
subject + had + not + past participle + finisher.
to fall
fallen
The sentence formula for declarative modal verbs.
subject + modal + verb + finisher.
fun
more fun
also introduces actions from same time (shorter answer)
as
present perfect modal negative
subject + modal + not + have + past participle + finisher.