it is easy to learn english only if you work hard.同义转换：learning english is easy only if you work hard.
it is +adj +to do sth造句
it
is
easy
to
learn
english
only
if
you
work
hard.同义转换：learning
english
is
easy
only
if
you
work
hard.2019-12-01
it
is
happy
to
swim2019-05-08
