I think it is quiet street 改为否定句

I think it is quiet street 改为否定句 I think it's a quiet street 改为否定句 改为否定句I think it is inyour sister is i think it is interesting.改为否定句 I think it is interesting(如何改为否定句)? I think it is a cat 改为否定句 it is a quiet street变疑问句,否定句,并回答 She enjoys the quiet street.（改为否定句） I think it is his pen.(改为否定句） I _______ _____it_______his pe I think it is going to rain.（改为否定句） I------------ ---------- I think I can mend it.改为否定句 I think it is a good idea.（改为否定句）……