Question

1. It's his pencil. (改为否定句) It ____his pencil. 2. That's his desk. (改为一般疑问句，并做简略

Answer 1

1. 否定句：

It is not his pencil.

这不是他的铅笔。

2. 一般疑问句：

Is that his desk? 

那是他的书桌吗？

肯定回答：Yes, it is. 是的。

否定回答：No, it isn't. 不是。

望采纳

Answer 2

1. It's his pencil.
改为否定句：
It is not his pencil.
它不是他的铅笔。
2. That's his desk.
改为一般疑问句：
Is that his desk?
那是他的书桌吗？
肯定回答：Yes, it is. 是的。
否定回答：No, it isn’t.
解析：It’s是It is的缩写形式，isn’t是is not的缩写形式。
否定回答：No, it isn't. 不是。

Answer 3

第一个句子的意思说，这是他的铅笔,一个一般现在时态的句子,主要句子构成是主语加be动词加其他，因为有了be动词，所以他想要变成否定句，直接在be动词的后面加not,所以它的否定形式为:
It is not his pencil.
第二个句子的意思，那是他的桌子,也是主语加be动词加其他的构成,改变成一般疑问句，只需要将be动词提前,主语换位置,首字母大写将句号变为问号就可以,最终的答案是:
Is that his desk?

Answer 4

It isn't his pencil .

Is that a desk?
Yes， it is.
或
No，it isn't.

句子中有be动词，变否定句是直接在be后加not
变一般疑问句是直接把be提到句子开头

Answer 5

1. It isn't his pencil.
2. Is that his desk? Yes, it is. No, it isn't.
3. Is Joy at school? Yes. she is. No, she isn't.
4. How old is David?
5. What's her name?