四、按照要求完成任务。
a. 莉莉、汤姆、马克斯和苏珊在打扫教室。连词成句，并组成完整的对话。
Lily:
1. dirty, classroom, is, our (.)
Tom: Good idea!
Lily:
2. sweep, please, Tom, floor, the (, .)
Tom: OK.
Max:
3. can, blackboard, I, the, clean (.)
Lily & Susan:
4. the, we, desks, can, clean, and, books, put away, the (.)
Tom:
5. now, is, classroom, clean, our (.)
Lily: Great!
b. 每位同学完成了什么打扫任务？在相应的方格里画 “√”。
a. 莉莉、汤姆、马克斯和苏珊在打扫教室。连词成句，并组成完整的对话。
Lily:
Our classroom is dirty.
Let's clean it.1. dirty, classroom, is, our (.)
Tom: Good idea!
Lily:
Please sweep the floor, Tom.
2. sweep, please, Tom, floor, the (, .)
Tom: OK.
Max:
I can clean the blackboard.
3. can, blackboard, I, the, clean (.)
Lily & Susan:
We can clean the desks and put away the books./We can put away the books and clean the desks.
4. the, we, desks, can, clean, and, books, put away, the (.)
Tom:
Our classroom is clean now.
5. now, is, classroom, clean, our (.)
Lily: Great!
b. 每位同学完成了什么打扫任务？在相应的方格里画 “√”。
答案：a. 1. Our classroom is dirty.
2. Please sweep the floor, Tom.
3. I can clean the blackboard.
4. We can clean the desks and put away the books./We can put away the books and clean the desks.
5. Our classroom is clean now.
b. Lily: CD Tom: A Max: B Susan: CD
2. Please sweep the floor, Tom.
3. I can clean the blackboard.
4. We can clean the desks and put away the books./We can put away the books and clean the desks.
5. Our classroom is clean now.
b. Lily: CD Tom: A Max: B Susan: CD
解析：
【解析】
a. 连词成句部分：
1. 该句为主系表结构的陈述句，主语为Our classroom，系动词为is，表语为dirty，组合为Our classroom is dirty.
2. 该句为祈使句，以Please引导动作，后接sweep the floor，称呼Tom放句末，组合为Please sweep the floor, Tom.
3. 该句为含情态动词can的陈述句，主语为I，谓语为can clean，宾语为the blackboard，组合为I can clean the blackboard.
4. 该句为含情态动词can的陈述句，包含两个并列动作clean the desks和put away the books，动作顺序可互换，组合为We can clean the desks and put away the books./We can put away the books and clean the desks.
5. 该句为主系表结构的陈述句，主语为Our classroom，系动词为is，表语为clean，now作状语放句末，组合为Our classroom is clean now.
b. 任务匹配部分：
根据对话内容：Lily和Susan负责擦桌子（图C）和整理图书（图D）；Tom被安排扫地（图A）；Max负责擦黑板（图B），据此完成勾选。
【答案】
a. 1. Our classroom is dirty.
2. Please sweep the floor, Tom.
3. I can clean the blackboard.
4. We can clean the desks and put away the books./We can put away the books and clean the desks.
5. Our classroom is clean now.
b. Lily: √C √D
Tom: √A
Max: √B
Susan: √C √D
【知识点】
1. 连词成句（陈述句、祈使句）
2. 情态动词can的用法
3. 日常劳动场景表达
【点评】
本题结合连词成句与图文匹配形式，考查学生对英语基本句型结构的掌握，以及情态动词can的运用，同时贴合教室打扫的日常场景，帮助学生将英语知识与实际生活结合，提升语言运用能力。
【难度系数】
0.7
a. 连词成句部分：
1. 该句为主系表结构的陈述句，主语为Our classroom，系动词为is，表语为dirty，组合为Our classroom is dirty.
2. 该句为祈使句，以Please引导动作，后接sweep the floor，称呼Tom放句末，组合为Please sweep the floor, Tom.
3. 该句为含情态动词can的陈述句，主语为I，谓语为can clean，宾语为the blackboard，组合为I can clean the blackboard.
4. 该句为含情态动词can的陈述句，包含两个并列动作clean the desks和put away the books，动作顺序可互换，组合为We can clean the desks and put away the books./We can put away the books and clean the desks.
5. 该句为主系表结构的陈述句，主语为Our classroom，系动词为is，表语为clean，now作状语放句末，组合为Our classroom is clean now.
b. 任务匹配部分：
根据对话内容：Lily和Susan负责擦桌子（图C）和整理图书（图D）；Tom被安排扫地（图A）；Max负责擦黑板（图B），据此完成勾选。
【答案】
a. 1. Our classroom is dirty.
2. Please sweep the floor, Tom.
3. I can clean the blackboard.
4. We can clean the desks and put away the books./We can put away the books and clean the desks.
5. Our classroom is clean now.
b. Lily: √C √D
Tom: √A
Max: √B
Susan: √C √D
【知识点】
1. 连词成句（陈述句、祈使句）
2. 情态动词can的用法
3. 日常劳动场景表达
【点评】
本题结合连词成句与图文匹配形式，考查学生对英语基本句型结构的掌握，以及情态动词can的运用，同时贴合教室打扫的日常场景，帮助学生将英语知识与实际生活结合，提升语言运用能力。
【难度系数】
0.7