请问英语问题??英语厉害的人请进~~~很急的,一定要正确!!

来源：百度知道编辑：UC知道时间：2024/09/28 15:07:11

将下列的句子改成疑问句和否定句~~
(1)In ancient times,people wrote numbers in many different ways.
(2)They then invented the zero.
(3)One of the first calculating machines was an abacus.
(4)Abacuses are fast and accurate,so people still use them today.
(5)It can also calculate percentages and square roots.

(1)In ancient times,people didn't write numbers in many different ways.
Did people write numbers in many different ways in ancient times?

(2)They then didn't invent the zero.
Did they then invent the zero?

(3)One of the first calculating machines wasn't an abacus.
Was one of the first calculating machines an abacus?

(4)Abacuses aren't fast and accurate,so people still don't use them today.

(5)It can't also calculate percentages and square roots.
Can it also calculate percentages and square roots?

(1)In ancient times,did people write numbers in many different ways?
(1)In ancient times,people didn't write numbers in many different ways.
以下如同这个。

1.Did people write numbers in many different ways in ancient times?
In ancient times,people didn't write numbers in many different ways.
2.Did they then invent the zero?
They then didn't invent the zero

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