Question

It is necessary that an efficient worker __________ his work on time.

accomplish accomplished can accomplish has accomplished 选哪个

Answer 1

选accomplish。
本句句首的It作
形式主语
，真正的主语是that引导的从句，即:that
an
efficient
worker
...
on
time。that引导的
主语从句
采用了
虚拟语气
，其完整的形式为It
is
necessary
that
an
efficient
worker
(should)
accomplish
his
work
on
time.
本句省略了主句从句中的should，因此accomplish为正确答案。
PLUS:
虚拟语气与
不定式
1.It
is
necessary
+
that
...
的结构中，that引导的主语从句的
谓语动词
要用虚拟语气，即
should
+
动词原形
，其中的should
可省略。
e.g.
It
is
necessary
that
we
(should)
finish
the
task
tomorrow.
2.
在不定式作形容词的主语的句式中，It
is
necessary
+
不定式
e.g.
It
is
necessary
for
you
to
lock
the
car
when
you
do
not
use
it.