Question

I have finished my homework for two hours/I have joined the army since 2005/

I have arrived in London for two days.哪里错了，请告知，谢谢

Answer 1

这三个句子中的动词finish，join和arrive
都是瞬间动词，动作完成即结束，不能持续。后面不能跟表示时间段的时间状语。
改为延续性动词
have
been
一般有两种更改方式
I
finished
my
homework
two
hours
ago.
I
joined
the
army
in
2005./
I
have
been
in
the
army
since
2005.
I
arrived
in
London
two
days
ago./I
have
been
in
London
for
two
days.