Question

同义句转换，小学英语，希望大神解答，最好有理由，保证给采纳，谢谢！

Answer 1

It's
nearly
9
years
since
China
joined
the
WTO.
中国加入WTO已经9年了。
join加入，是一个瞬间性动词，即这个动作是一瞬间完成的，所以用一般过去式。
小学英语啊！不知道下面针对这种句型的解释你能看懂吗？看不懂你再追问吧。
句型it
is/was
+时间段n.+
since(自从...已经多久了)
关于这个句型要注意以下几个方面(时态搭配和辨别v.是延续性v.还是短暂性v.)
1.it
is
+时间段n.+
since
sb.
have
done(该v.必须为延续性v.,翻译时直译)
或是it
is
+时间段n.+
since
sb.did(如v.为短暂性v.即瞬间性v.翻译时直译,如为延续性v.
翻译时反译)
eg.It
is
5
years
since
I
have
lived
here.(live为延续性v.故直译为自从我住在这儿已经5年了。)
It
is
5
years
since
I
lived
here.（live为延续性v.故反译为我已经5年不住这儿了。）
It
is
3
years
since
I
smoked.（smoke为延续性v.故反译为我已经3年不吸烟了。）
It
is
3
days
since
the
accident
happened.（happen为短暂性v.故直译为自从这场车祸发生已经有3天了。）
It
is
10
years
since
they
married.（marry为短暂性v.故直译为自从他们结婚已经有10年了。）
2.it
was
+时间段n.+
since
sb.
had
done（就实际情况翻译）
He
said
it
was
5
years
since
they
had
seen
each
other.