Three+years+ago+we+began+to+learn+English.肯定句否定句一？

Question

如题所述

Answer 1

Three years ago we began to learn English. 三年前我们开始学英语。

Three years ago we didn't begain to learn English. 三年前我们没有开始学英语。

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如果有be动词，那么就在be动词后面加not即可，即：

Mike is a student. —— Mike isn't a student.

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如果没有be动词（如本题），那么就要借助助动词do/does/did；具体用哪一个要结合人称和时态来判断。例如我们这道题就是借助了助动词did，因为时间状语“three years ago”已经是过去时间，所以助动词当然也是用过去时呀。又因为动词在助动词后面，所以要写成原形。

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Answer 2

这句话本身就是一般过去时的肯定句，变为否定句或一般疑问句时必须借助一般过去时的助动词did。应该注意的是:如果利用助动词did，根据一般过去时的语法要求，其谓语动词必须恢复为动词原形形式。参考:
否定句:Three years ago we didn't begin to learn English.
一般疑问句:Did you begin to learn English three years ago?

Answer 3

Three years ago we began to learn English.
改为否定句是直接在主语后加入助动词didn't，原来的动词要还原。
Three years ago we didn't begin to learn English.
改为一般疑问句是直接在句子开头加助动词did的，原来的动词要还原。
Did you begin to learn English three years ago?

Answer 4

three years before, we did not begin to learn english