ページ1:

Ability in the present
can can't infinitive
Ability in the past
Could. couldn't infinitive
was.
wasnt
able to
infinitive
were
-
weren't
↓
Positive in the past
04
one specific
7) only
was / were abel To
e.f. I was able to finish the race
in less than an
But
hour yesterday
negative sentence
specific
using Both. I couldn't,
wasn't able to
werenly able to

ページ2:

Position of Adverbe of Manner
①generally
at the end.
e.d. I poured the water carfully
directly before the verb
e.g. I carefully poured the water
3.
at
the beginning of the sentence
e.d. Carefully, I poured the water.