ページ1:

2"
(1)
ago
→
「時を表す語を用いる時→過去形
単独で用いる時→用いれない
before
→時を表す語を用いる時→現在完了
単独で用いる時→過去形
現在完了
過去完了
No.
45
Date
(2)
© I (had) (not) been waiting (long) (before) I heard footstep
coming upstairs
間もなく~する」
It is
not long before SV ~.
I be not [long
(in)~mg
a
long time
@ Our teacher wants
WA
the experiment
as
quickly as possible
before it gets darker.

ページ2:

No.
96
Date
(3) He started doing his assignment when I left home.
He will have finished fir assignment
by
the
time e
get hone
it
6 ~までには」
Fly
(前置詞)
lg the time (副詞節をつくる)、
→時に用いて、「完了」を表す
(4) a: Mary and I have kept
in touch since we
-left high school.
often
b: How many times.
Many
do you see each other ?
ae Once a
marco
maybe twice. And we
talk on
the phone
←
0
occasionally
aが「月に1度か子度かな。」といっているので、直前でbは
「頻度」を聞いたことがわかる。
したがって How often
~
を用いる。