Zoology教案
3.—are you coming for dinner?
—i’m not sure.i might go to my aunt’s instead.
4.there was plenty of time.we needn’t have hurried.
5.nancy dare not go out alone at night.
6.i must finish the report before this weekend.
7.i can read english much faster than before.
8.would she like to borrow my bicycle?
9.she is rehearsing a new play.she must be very busy now.
10.it’s getting late.i’m afraid i have got to go.
(bb:should/ought to;may/might/could;need,dare;must/have (got) to;can/be able to;shall/will)
t:now,who’d like to explain the first sentence?
s1:埃倫本來應該遵守諾言的。我奇怪他為什么改變了主意。
“should” is used to indicate “obligation” or “duty”.the structure with perfect infinitive is used to talk about things which did not happen,although they were supposed to.
suggested answers:
2.你不應該吃太多的垃圾食品。
“shouldn’t/oughtn’t to” is the negative short form of “should/ought to” expressing “advice”.
3.——你會來吃晚飯嗎？
——我說不準。或許我得去我姑媽家。
“may/might/could” is used to talk about “possibility”.
4.還有充足的時間，我們不必匆匆忙忙的。
“needn’t” is the negative short form of “need”.
the modal verb “need”,which is used to express “necessity”,is today most commonly used in negative statements.
5.南希晚上不敢獨自一人外出。
the modal verb “dare” means “have enough courage”.it is used especially in negative statements and questions.
6.周末前我必須完成這份報告。
“must” is used to express “necessity in future time”.
7.我比從前閱讀英語快多了。
“can” is used to talk about “the ability to do sth.”.
8.她想借用我的自行車嗎？
“would” is used in offers or invitations.
9.她正排練一出新戲，她現在一定很忙。
“must” here is used to draw a logical conclusion.
10.天不早了，恐怕我得走了。
when there seems to be no other choice,“have to” is used.“have got to” is used in spoken english instead of “have to” in written english.
t:can you tell the differences between “can” and “be able to”?
s2:no.
t:“can” and “be able to” both indicate “ability”,but “can” is used only in the present indefinite tense and the past indefinite tense while “be able to” is used in different kinds of tenses.
s3:will you explain the usages of the two modal verbs “shall” and “will”?
t:“shall i.../shall we...” are often used to make suggestions.“will you.../would you...”are often used to indicate requests.i’ll give you two examples.look at the blackboard,please.
(bb:shall we take our swim-suits?