1.It's interesting to sing english songs
=>English songs are interesting
2, Playing badminton is easy
=>It's easy to play badminton
3, To learn chinese is difficult
=>It's difficult to learn Chinese
4, What an interesting novel!
=>The novel is interesting
5, Nam prerfers walking to ridding a bike
=> Nam would rather walk than ride a bike
6,Iit is said that Hoa broke the vase
=>It is said that the vase was broken by Hoa
7, She can sew better than Hoa
=>Hoa can't sew better than her

1, English songs are intersting.
2, It is not difficult to play badminton.
3, It is not easy to learn Chinese.
4, The novel is interesting.
5, Nam would rather walk than ride a bike .
6, It is said that the vase was broken by Hoa .
7,Hoa can not sew better than her .

1, its interesting to sing english songs
--> Singing english songs are interesting
2, playing badminton is easy
--> It's easy to play badminton
3, to learn chinese is difficult
--> Learning Chinese is difficult
4, what an interesting novel
--> The novel is interesting
5, Nam perfers walking to ridding a bike
--> Nam would rather walk than ride a bike
6, it is said that Hoa broke the vase
--> It is said that the vase was broken by Hoa
7, she can sew better than Hoa
Hoa can't sew better than her