i think it is interesting.改为否定句

i think it is interesting.改为否定句 I think it is interesting(如何改为否定句)? 把i think this story is interesting.改为否定句 I think this movie is interesting 改为否定句 I think the movie is very interesting.改为否定句 i think the movie is very interesting改为否定句 改为否定句I think it is inyour sister is I think it is quiet street 改为否定句 I think it is a cat 改为否定句 it is a very interesting book.(改为否定句） — — interesting book i i think the movie is very interesting.改为否定句 i wa I think Maths is my interesting .(改为否定句）怎么改?