Loading... Please wait...5. needn’t have done
needn’t have done 表示过去做了某事，但没有做的必要， 意为“本没必要…”。
You needn’t have waken me up; I don’t have to go to work today.
注：表示推测过去某动作发生的可能性时，就表示的可能性程度而言，must最大，could其次，may更次之，might最小。例如：
“I wonder how Tom knew about your past.”
“He must / could / may / might have heard of it from Mary.”
二、情态动词+动词进行式
情态动词+行为动词进行式（即情态动词+ be + doing形式），表示推测或评论某动作现在是否正在进行。例如：
1）He must be playing basketball in the room.
2）She may be staying at home.
三、情态动词+动词完成进行式
情态动词+行为动词完成进行式（即情态动词+ have been + v-ing 形式），表示推测或评论过去某动作是否正在进行或一直在进行。例如：
1）They should have been meeting to discuss the problem.
2）He may / might have been buying stamps in the post office when you saw him.
四、某些情态动词的特殊用法
1. need
考试中主要测试 need 作情态动词与作实义动词的区别.
情态动词need与实义动词need 在时态、肯定、否定结构上的对比见下表。
时态 情态动词need 实义动词 need
现在时 He need (needn’t) do
Need he do….? He needs (doesn’t need) to do
过去时 He needed (didn’t need) to do
将来时 He need (needn’t) do
Need he do….? He will (not) need to do
注: need 一般用于否定句或疑问句.
2. dare
考试中主要测试dare作情态动词和作实义动词的区别。
情态动词dare 与实义动词dare 在时态、肯定、否定、疑问结构上的对比见下表。
句型 情态动词dare 实义动词 dare
肯定句 现在时 dare to 少用
过去时 dare to 少用 现在时 dare/dares to do
过去时 dared to do
否定句 现在时 daren’t/dare not do
过去时 dared not do 现在时 do/does not dare (to) do
过去时 did not dare (to) do
疑问句 现在时 Dare he do?
过去时 Dared he do? 现在时 Do you/Does he dear (to) do?
过去时 Did he dare (to) do
3. can 和 may
考试中主要测试can，may或could，might表示可能性的区别及对may构成的疑问句的回答。
（1）can, could, may, might都可以表示可能性.can, could表示潜在的可能性或理论上或逻辑判断上存在的可能性；而may, might则表示事实上的可能性。此外，can还具有“有能力”的意思，而may与might则不具此意。例如：
According to the weather forecast, it may rain tomorrow.
Any man with a little sense can see that he is wrong.
（2）May I / we …？这一类疑问句的肯定回答为Yes, please.或Certainly；否定回答为Please don’t.或No, you mustn’t. 例如：
“May we leave now?” “No, you mustn’t. You haven’t finished your home work yet.”
4. can 和 be able to
can 与 be able to 都可以表示能力，但两者在用法上有点差异：can (could)表示主观能力，不表示意愿，它的将来时用will be able to; be able to表示主观意愿，强调要克服困难去做某事。例如：
1）My grandma is over seventy, but she can still read without glasses.
2）He is able to give up his bad habits.
5. must 和 have to
must 和 have to 都可以表示“必须”，但有几点区别：
（1）must 强调“内在的职责”、“义务”，而have to 强调“外界压力”、“不得已而为之”。
（2）have to可用于多种时态，而must一般用于现在时，其过去时与将来时分别由had to与shall / will have to代替。
（3）在回答must引起的问题时，如果是否定的答复，不能用mustn’t，而要用needn’t或don’t have to，因为mustn’t是“一定不要”、“一定不能”的意思。例如：
1）You must come to the classroom before eight.
2）It is raining hard outside, but I have to leave now.
3）“Must we do it now?” “No, you needn’t.”
6. used to +do, be used to +doing和be used to +do
（1）used to +v意为“过去常常”，“过去一直”；be used to +v-ing / n（名词）意为“习惯于”；be used to +v意为“被用来（做某事）”。
（2）used to只表示过去，而be used to +v-ing / n可表示现在、过去或将来。例如：
1）He used to smoke. Now he doesn’t.
2）He’s quite used to hard work / working hard.
3）The knife is used to cut bread.
7．用作情态动词的其他短语
would rather, would sooner, would (just) as soon, had rather, had better, had sooner, can not but, may (just) as well等可用作情态动词。例如：
1）The soldier would sooner die than surrender.
2）The brave soldier would as soon die as yield to such an enemy.
3）I’d rather walk than take a bus.
4）If you don’t like to swim, you may just as well stay at home.
注：这些短语后一般直接跟动词原形.would (had) rather, would (had) sooner, would (just) as soon后可跟that 引导的从句，that 常省去，从句要用虚拟语气。对现在和将来的假设用过去时，对过去的假设用过去完成时。例如：
1）I would rather you came on Sunday.
2）I would sooner you hadn’t asked
Period 7 Listening and exercise
Step 1 Listening about carvals
1.Introduction of carnivals:
狂欢节（Carnival），世界上不少国家都有狂欢节。这个节日起源于欧洲的中世纪。古希腊和古罗马的木神节、酒神节都可以说是其前身。有些地区还把它称之为谢肉节和忏悔节。该节日曾与复活节有密切关系。复活节前有一个为期40天的大斋期，即四旬斋（lent）。斋期里，人们禁止娱乐，禁食肉食，反省、忏悔以纪念复活节前3天遭难的耶稣，生活肃穆沉闷，于是在斋期开始的前3天里，人们会专门举行宴会、舞会、游行，纵情欢乐，故有\"狂欢节\"之说。如今已没有多少人坚守大斋期之类的清规戒律，但传统的狂欢活动却保留了下来，成为人们抒民对幸福和自由向往的重要节日。
欧洲和南美洲地区的人们都庆祝狂欢节。但各地庆祝节日的日期并不相同，一般来说大部分国家都在2月中下旬举行庆祝活动。各国的狂欢节都颇具特色，但总的来说，都是以毫无节制的纵酒饮乐著称。其中最负盛名的要数巴西的狂欢节。
2. Let Ss read the questions on page 6.
3. Have Ss listen once and make notes beside the quertions.
4. Have them write their answers and check them with a partner.
5. Check the answers with the class.
Step 2 Doing exercise left.
Period 8
Step 1. Dictation for the new of unit 1
Step 2. Listenin of the Easter in the workbook.
1. Introduction of Easter
Most English holidays have a religious origin. Easter Day occurs on the first Sunday after the full moon following the spring equinox[1].It is originally the day to commemorate the Resurrection of Jesus Christ. But now for most people, Easter is a secular spring holiday, while for the children, it means, more than anything else, Easter eggs or chocolate eggs! On Easter Sunday morning, the breakfast eggs are boiled in several pans in some families.Each containing a different vegetable dye, so that when they are served the shells are no longer white or pale brown in color, but yellow or pink, blue or green. The dyes do not penetrate[2] the shell of course. Easter eggs are meant to give enjoyment-- and they do! They are pretty and decorative, they signal good wishes and shared happiness in the changing seasons.
2.Listen to the passage and find the answers to all the questions.