三、句式变化

(一)一般过去时的一般疑问句

1、把was, were放在句首，其余位置不变。由Was…?引导的一般疑问句，肯定答为：Yes，… was. 否定回答为：No，…. wasn’t. 由Were…?引导的一般疑问句，肯定回答为：Yes，… were. 否定回答为：No，… weren’t. 如：

(1)I was born in Shanghai. →Were you born in Shanghai?

→Yes, I was. (肯定回答) →No, I wasn’t. (否定回答)

(2)They were in Li Yan’s home last night.

→Were they in Li Yan’s home last night?

→Yes, they were. (肯定回答) →No, they weren’t. (否定回答)

2、在行为动词的句子中，要用助动词词did来引导，其余的语序不变。要注意的是，要把行为动词的过去式改为原形。肯定回答为：Yes, …did. 否定回答：No, …didn’t. 如：

John played computer games last night.

→Did John play computer games last night?

→Yes, he did. (肯定回答) →No, he didn’t. (否定回答)

(二)一般过去时的否定句

1、在表示过去存在的状态的句子中，相接在was, were的后面加上not。

如：(1)He was in the park the day before yesterday. →He was not in the park the day before yesterday.

(2)We were busy last week. →We were not busy last week.

2、在表示过去的时间发生的动作的句子中，要在行为动词的前面加助动词didn’t.然后把过去式的行为动词改为动词原形。即：didn’t + 动词原形。如：

(1)She played the violin last night. →She didn’t play the violin last night.

(2) They swam in the lake yesterday. →They didn’t swim in the lake yesterday.

(三) 一般过去式的特殊疑问句

1.What did … ?(主要是询问过去发生了什么事情，注意要把过去式改为动词原形。)

We ate Chinese food last night. →What did we eat last night?

2.Where did ?( 主要是询问过去事情发生的地方。)

They sang and dance in the music room yesterday morning.

→Where did they sing and dance yesterday morning?

3.Who + 动词过去式 … ?( 主要是询问过去事情发生的人物。)

Mike and Tom climbed mountains last weekend.

→Who climbed mountains last weekend?