I am very sad to hear that.
1,reading;reading English 做从句主语
2,to read ;短语tell sb. to do sth.
She tells me reading(read)English is good for us.
She tells me to read (read) English every day.
听了这件事,我很难过 i'm sorry to hear that.
i am sorry to hear that
she tells me that reading english is good for us
she tells me that i should read english every day
听了这件事我很难过:I'm sorry to hear that
1.reading
2.to read