还有there is no use doing sth.与它们的区别
be no use doing sth是梁毕陪肯定的，数带绝对没错。
例如 It is no use watching too much TV.
看太多电视是没用的
这是固定搭配
所谓的接to do sth，是用在be used to do sth被用来做某事
It is no use trying to persuade him to have a holiday because he is a workaholic.(P53) 其中用了 It’s no use doing sth. (做某事没用 / 只是白费力气)句型。在这个橡蠢句型中， 动词-ing形式trying to persuade him to have a holiday是主语，it 是形式主语。这种动词-ing作主语，it 作形式主语的句型还有：
1. It is no good doing sth. 做某事不好 / 没用 / 不行
2. It’s a waste of time / money doing sth. 做某事是白费时间 / 金钱
3. It’s fun doing sth. 做某事很有趣
be
no
use
doing
sth是肯定的，绝对没错。
例如
It
is
no
use
watching
too
much
TV.
看太多电视是没用的
这是固定搭配
所谓的接to
do
sth，是用在be
used
to
do
sth被用来做某事
It
is
no
use
trying
to
persuade
him
to
have
a
holiday
because
he
is
a
workaholic.(P53)
其中用了
It’s
no
use
doing
sth.
(做答羡某事没用
/
只是白费力气)句型。在这个句型中，
动词-ing形清雹拍式trying
to
persuade
him
to
have
a
holiday是肆念主语，it
是形式主语
