第1个回答 2019-05-14
与现在事实相反
从句用一般过去时(be用were)主句用would/should/might/could+动词原形
将来事实相反
从句用
一般过去时或were
to
do或should
do
主句用would/should/might/could+动词原形
过去事实相反
从句用过去完成时
主句用would/should/might/could+have
done
When
a
pencil
is
partly
in
a
glass
of
water,
it
looks
as
if
it
were
broken.
与现在事实相反,所以从句用过去时,be动词的虚拟用were
The
two
strangers
talked
as
if
they
had
been
friends
for
years.
从主句talked表示与过去相反,所以从句用过去完成时had
been