二、本模块我们学习了询问事情发生的原因和结果。请根据下列提示,模仿例句造句。注意时态。
例: tired / go to bed very late
A: Why are you tired?
B: Because I went to bed very late.
1. happy/ get a nice present
A:
B:
2. sad/ hurt my hands
A:
B:
3. eat a lot/ hungry
A:
B:
4. wear a raincoat/ rain
A:
B:

1. A: Why are you happy?
B: Because I got a nice present.
2. A: Why are you sad?
B: Because I hurt my hands.
3. A: Why did you eat a lot?
B: Because I was hungry.
4. A: Why did you wear a raincoat?
B: Because it rained.

【分析】首先回忆例句的结构：用Why引导的特殊疑问句询问原因，答句用Because引导的原因状语从句，需注意时态匹配（均为过去发生的动作/状态，动词要变为过去式）。解题时，先明确每组提示的两个内容：一个是结果（情绪或动作），一个是原因，再根据结果的词性（形容词用be动词，实义动词用助动词did）构造疑问句，答句的原因部分动词变为过去式即可。
【解析】1. 提示中happy是情绪（结果），用be动词are构造疑问句：Why are you happy?；原因部分get a nice present是过去动作，get变过去式got，答句：Because I got a nice present.
2. sad是情绪（结果），用be动词are构造疑问句：Why are you sad?；原因部分hurt my hands，hurt过去式不变，答句：Because I hurt my hands.
3. 提示中eat a lot是动作（结果），实义动词eat的过去式疑问句需加助动词did，构造：Why did you eat a lot?；原因部分hungry是状态，对应be动词was，答句：Because I was hungry.
4. 提示中wear a raincoat是动作（结果），实义动词wear的过去式疑问句加did，构造：Why did you wear a raincoat?；原因部分rain是过去动作，变rained，答句：Because it rained.
【答案】1. A: Why are you happy? B: Because I got a nice present.
2. A: Why are you sad? B: Because I hurt my hands.
3. A: Why did you eat a lot? B: Because I was hungry.
4. A: Why did you wear a raincoat? B: Because it rained.
【知识点】询问原因的特殊疑问句、一般过去时、because引导的原因状语从句
【点评】本题围绕询问原因的句型展开，重点考察一般过去时在原因问答中的运用，需区分be动词类形容词和实义动词类动作对应的疑问句结构，是基础语法的巩固练习。
【难度系数】0.5