I think it is his pen.(改为否定句） I _______ _____it_______his pe

I think it is his pen.(改为否定句） I _______ _____it_______his pe I think it is his pen同义句 改为否定句I think it is inyour sister is His pen pal lives is singapore.（改为否定句） I have a pen pal in j I think it is quiet street 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)? I think it is a cat 改为否定句 I think it is going to rain.（改为否定句） I------------ ---------- I think he is as tall as his father,(改为否定句） I think it's exciting.（改为否定句） I think it is a good idea.（改为否定句）……