The green apple is sour 改否定句

The green apple is sour 改否定句 Tom has a green apple.(改否定句） The orange is sour改成否定句,一般疑问句,肯定回答,否定回答,对sour提问 This is an apple 改为否定句,怎么改? 英语否定句怎么改?there s an apple on the desk改为英语否定句 There is an apple in the box.改成否定句 There is an apple on the table.否定句 is there an apple on the table.否定句 The Green family are eating dinner 改一般疑问句 否定句 肯定句 肯定 否定回答 Give him an apple.(改否定句) The girl is veryquiet改否定句 The lion is afraid 改否定句