D．特殊疑问句：特殊疑问词+do +(非第三人称单数)主语+V+其它 Where do you come from?

特殊疑问词+does +(第三人称单数)主语+Vs+其它 Where does he come from?

特殊疑问词+be (is, am, are)+主语+其它 Where are you from?

特殊疑问词+情态动词(Can, May, Should, Must)+主语+ V+其它 Can she go? 二、现在进行时: 表示现在正在进行的动作。 结构：

1. be动词( is , am , are) + 动词ing (现在分词)；

is , am , are 放在主语前帮助疑问句，后面的动词加ing；

is , am , are 后面加上not帮助否定句，后面的动词加ing。

A. 肯定句:主语+be（is, am, are）+Ving+其它 They are coming here.

B. 否定句：主语+be（is, am, are）+not +Ving+其它 They aren’t coming here.

C. 一般疑问句：be（Is, Am, Are）+主语+ Ving+其它 Are they coming here?

D. 特殊疑问句：特殊疑问词+ be（is, am, are）+主语+ Ving+其它 What are they doing?

三、一般过去时：表示过去某个时间里发生了的动作或状态。 结构：

1. 动作词用过去式(ed ) ；

在主语前加did帮助疑问句，后面的动词用原形；

在动作词前加didn’t帮助否定句，后面的动词用原形。

2. 句子中没动作词时，用be动词的过去式：was , were；

was , were 放在主语前帮助疑问句； was , were后面加上not帮助否定句。

A. 肯定句：主语+Ved+其它 We came from China

主语+be (was, were)+其它 We were from China.

B. 否定句：主语+didn’t +V +其它 We didn’t come from China.

主语+be (was, were) +not+其它 We weren’t from China.

C．一般疑问句：Did +主语+V +其它 Did you come from China?

be (Was, Were)+主语+其它 Were you from China?

D．特殊疑问句：特殊疑问词+ did +主语+V +其它 Where did you from?

特殊疑问词+ be (was, were)+主语+其它 Where were from?

四、一般将来时：表示将来某个时间的动作或状态。 结构：