i understand变成否定句

i understand变成否定句 I am excited变成否定句 变成否定句 变成否定句 还要变成否定句 变成否定句 i have some comic books.变成否定句 I am a scool boy 变成否定句怎么写 I took many pictures last weekend.(变成否定句) I watch TV on the weekend.(变成否定句) I went to Beihai park last Sunday.(变成否定句) i must eat some food.怎么变成否定句 I watch TV on the weekend.(变成否定句) I often get up at six.变成否定句 I'm going to learn kung fu.变成否定句 I have to go to shool变成否定句 I am jane变成否定句之后的句子 I am a girl 变成否定、疑问 肯定句