I know his teacher.(改为否定句)

I know his teacher.(改为否定句) I Know his name(改为否定句) i know his name改为否定句 I know his brother’saddress怎么改为否定句 I know his name.(改为否定句） l know the teacher 改为否定句 his mother is teacher [改为否定句] This is his teacher(改为否定句) i am your teacher 改为否定句 i know her name .(改为否定句) I know the answer 改为否定句 I know her name 改为否定句