Unit 8 It must belong to Carla.Period 5(Section B 3a－Self Check) 课件(共12张PPT)

(共12张PPT)
Unit 8　It must belong to Carla.
Period 5(Section B 3a－Self Check)
情态动词表示推测的用法
(1)must的用法
must用在肯定句中表示较有把握的推测，意为“一定”。“must＋动词原形”和“must be＋现在分词”分别表示对现在的状态和现在正在发生的事情的推测。如：①He must know my address. 他肯定知道我的地址。
②He must be studying in his room.
他一定正在房间里学习。
(2)can/could的用法
1)can表示推测时，常用于否定句或疑问句中。can't意为“一定不；不可能”，语气很肯定。如：
He can't be at home.
他一定不在家。
2)can/could后接be doing，表示对现在发生的动作进行猜测。如：
They can't be reading in the library.
他们不可能在图书馆看书。
3)could可用于表示有可能发生或可能是事实。还可用于表示客气、委婉、礼貌等请求语气。如：
①The plane could be delayed by fog.
飞机可能会因雾晚点。
②Could I call your first name
我可以用你的名字称呼你吗？
(3)may/might的用法
“may/might＋动词原形”表示对现在或将来情况的推测；may/might＋be doing表示对正在进行的情况的推测。may的语气强于might，常用于肯定句中，意为“也许；可能；大概”。如：
①You may be right.
你可能是对的。
②It might rain this afternoon.
今天下午可能会下雨。
【话题呈现】
本单元以“Mysteries”为话题，该话题的写作通常采用“Guided Writing”形式，有中文或英文内容提示，根据提示内容写作；或根据图画提示内容，发挥合理想象，描述图片内容，并连成一个小故事。
结合本单元话题的特点，写作时应注意：
1．仔细阅读写作提示或观察图画，猜测或判断故事背景和内容。
2. 确定写作要点，描述猜测的内容或判断的结论，选用适当的情态动词和时态。通常用情态动词来表达猜测或判断，常见的有must, may, might, could和can't等词。本单元话题涉及多种时态，因此要注意时态的正确使用。
3. 简要说明做出猜测或判断的理由。
【佳句荟萃】
①It must be teenagers having fun.
肯定是青少年们在娱乐。
②The guitar might belong to Alice. She plays the guitar.
这把吉他可能是艾丽斯的，她会弹吉他。
③He might be running to catch a bus.
他跑着可能是为了赶公共汽车。
④I am really anxious, because I can't find my backpack.
我真的很着急，因为我找不到我的背包了。
⑤It's dark and scary here.
这儿又黑又恐怖。
⑥At first, I thought it might be a dog.
起先，我以为那可能是条狗。
⑦The road is wet. It must have rained last night.
路很湿，昨晚肯定下过雨。
【写作任务】
某英文周刊正在进行以“One Thing I'll Never Forget”为题的征文活动。请根据下面的内容提示写一篇英语短文，记述一件令你难忘的事情，以此参加此次活动。
要点：(1) 描述事情的经过；(2) 谈一谈从中得到的启示。
要求：(1) 紧扣主题，语言表达准确，语意通顺、连贯；(2) 不少于100词；(3) 开头已给出，不计入总词数。
One Thing I'll Never Forget
You must have done many things in your life, but is there one thing you'll never forget As for me, there is one thing I'll never forget.
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【范文展示】
One Thing I'll Never Forget
You_must_have_done_many_things_in_your_life,_but_is_there_one_thing_you'll_never_forget _As_for_me,_there_is_one_thing_I'll_never_forget.
It was a sunny afternoon. I was reading on a bus when an old man got on it. There were no empty seats, so he had to stand. I wanted to give my seat to him, but I was afraid that the other people on the bus would say, “That girl just wants to be praised.”
Suddenly, a boy behind me stood up and gave his seat to the old man. I regretted not having acted sooner.
From that I learned that we should be ready to help people in trouble and shouldn't care what other people say or think. If we do, the world will become much more beautiful！(110 words)