否定就直接在be后面加上not 就可以了.比如 There are some apples.否定是There are not any apples. there is a bird in the tree.否定是there is not a bird in the tree. 疑问句直接吧 be 提到句子的最前面就可以了,一上面的为例 are there any apples?yes,there are./no,there are not. is there a bird?yes,there is./no,there is not.
