《Let's celebrate!》SectionⅢ精美版课件

气比较肯定，通常只用于肯定句中。
◆I didn’t hear the phone.I must have been asleep.
我没听到电话，我肯定是睡着了。
2．may (might) have done 表示对已发生的动作或存在的状态进
行不肯定的推测；might 的语气比 may 弱；主要用于肯定句或
栏目 导引
Unit 2 Let’s celebrate！
4．should (ought to) have done 表示过去本应该做某事但实际上
没做，其否定式表示过去不该做某事但做了。
◆You ought be allowed to do sth.
must have taken
not
to
have
made
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Unit 2 Let’s celebrate！
3．shall 与 should 的用法 (1)shall ①shall 用于疑问句中，表示征求对方的意见，这时可以用第一 人称和第三人称。 ◆Henry is waiting outside.Shall he come in, sir? 亨利正在门外等着，要他进来吗，先生？ ②shall 用于陈述句，常与第二人称或第三人称连用，表示允诺、 命令、警告和强制，或表示说话人的决心等。 ◆You shall be punished for what you’ve done. 你会为你所做的事情受到处罚。 ◆Tell Jerry he shall get a gift if he is nice. 告诉杰里，如果表现好，他会得到一份礼物。
◆The two teams are equal in ability, so the game between them
ought to be a close one. 这两个队能力相当，因此他们之间的比赛应该是一场势均力敌
的比赛。
(3)ought to 的否定式是在 ought 后加 not，疑问式是将 ought
否定句中。
◆The boy might have known the truth, but I am not quite sure.
那个男孩(当时)也许知道了真相，但我不是很确定。
栏目 导引
Unit 2 Let’s celebrate！
3．can (could) have done 表示对过去的某种情况的怀疑或不确 定，一般用于否定句和疑问句中；could 的语气较 can 弱。could have done 还可表示过去本来能做的事情却没做。 ◆He cannot have left.His bag is still in the room. 他绝不可能走了，他的包还在房间里呢。 ◆In my view, this accident could have been avoided. 依我看，这次事故本来是可以避免的。
提前。
◆If you make a promise, you should keep it and you ought not
to break it. 如果你做出了承诺，你就应该遵守诺言，不应该食言。
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二、情态动词＋have done
Unit 2 Let’s celebrate！
1．must have done 表示对过去发生的动作或状态进行推测，语
needn’t have spent
她可能出去了，因为电话一直在响。
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Unit 2 Let’s celebrate！
2．will 与 would 的用法 (1)表示意愿，would 是 will 的过去式。 ◆I will do my best to help you.我愿尽力帮你。 ◆—Why didn’t you come to Simon’s party last night? ——你昨晚为什么没有来参加西蒙的聚会？ —I wanted to, but my mom simply would not let me go out so late at night. ——我想去，但是我妈妈不愿意让我晚上这么晚出去。
ought to pay attention to
shouldn’t be any difficulty
5．needn’t needn’t have spent
in favour of
have
done
表示过去做了不必做的事情。
needn’t have spent
◆We needn’t ought to pay attention to
shouldn’t be any difficulty
◆To build be allowed to do sth.
in favour of
up
our
body,
we
ought
to
do
enough
exercise,
such
must have taken
must have taken
shouldabessorruudenning, swimming and hiking.
needn’t have spent
吗？ needn’t have spent
ought to pay attention to
in favour of
ought to pay attention to
◆She might shouldn’t be any difficulty go out because the phone was ringing all the time.
6．would like/love to have done sth.表示本打算/本想做某事。 ◆I would like to have read the article, but I was very busy then. 我本打算读这篇文章的，但是当时我太忙了。
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Unit 2 Let’s celebrate！
shouldn’t be any difficulty
sSheocutilod为nn’Ⅲt b了e aUnsyi增ndgiflfai强cnuglutya体ge &质Writ，ing 我们应该做足够的运动，比如跑步、游泳和远
足。
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(2)表示说话人的猜测。
Unit 2 Let’s celebrate！
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Unit 2 Let’s celebrate！
(2)表示把握不大的推测，意为“有可能”。用于肯定句或否定
in fav句our o中f ；might 语气更加不肯定。
must have taken
◆The traffic needn’t have spent
shouldn’t be any difficulty
must have taken
have
worried
about
the
maths
exam.It
was
a
shouldn’t be any difficulty
muspt hiaveectaekenof cake.
我们本不必担心数学考试，实际上它很容易。
栏目 导引
Unit 2 Let’s celebrate！
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Unit 2 Let’s celebrate！
◆You may choose whatever you like. 你喜欢什么就选择什么。 ◆—May I stay in the room for a while? ——我可以在这个房间待一会儿吗？ —Yes, you may./No, you mustn’t. ——是的，可以。/不，不可以。
fun
of
him,
and
you
should
have
be allowed to do sth.
shouldn’t be any difficulty
learned needn’t have spent from him.
ought to pay attention to
be in
fha你avromufr本uolfto 不应该取笑他的，你本应该向他学习。
栏目 导引
Unit 2 Let’s celebrate！
表示“过去常常”，但仅表示过去的习惯性动作(不 would
表示状态)，现在有可能还如此，也可能不再那样 表示“过去常常”，既表示过去的动作也表示过去 used to 的状态，不过现在不再做或不再有那种状态了
◆He would sit there for a long time, doing nothing. 他过去常常长时间地坐在那里，什么也不做。 ◆She loves the song in particular, because her mother used to sing it. 她特别喜欢这首歌，示责任和义务，意为“应该”。
Unit 2 Let’s celebrate！
◆The children should be taken good care of. 这些孩子应该受到好的照顾。
②表示推测，指有一定根据的推测，意为“按道理应该”。
◆It is three o’clock now.The football match should begin soon. 现在 3 点了。足球赛应该很快就要开始了。 ③表示惊讶，意为“竟会，居然”。
Ⅰ 选词填空 1．He___m__ig_h_t__ (must/might) get here in time, but I can’t be sure. 2．As middle school students, we _o_u_g_h_t_t_o__ (have to/ought to) learn from the real heroes. 3．He _c_a_n_’__t___ (can’t/mustn’t) have missed the train; he arrived at the train station two hours early. 4．Tom, you are too lazy.The work __s_h_o_u_ld___ (must/should) have been finished yesterday. 5．She __m_i_g_h_t___ (might/need) have achieved greater progress, if you had given her more chances.
shouldn’t be any difficulty
in
the
paper
in
time,
we
ought
to
have
a
busy
must have taken
schedule. should be so rude
in favour of
must have taken
inneefadvno’为tuhraovf了e spe及nt 时交上论文，我们的日程应该紧一点。
栏目 导引
Unit 2 Let’s celebrate！
(2)表示征求意见或提出请求。would 的语气更加委婉。 ◆Would you please come here to help me? 请你来这儿帮我好吗？ (3)表示习惯或特性，以及自然的规律性。will 用于现在，would 用于过去。 ◆Every morning he will have a walk along this river. 每天早晨，他总是沿着这条河散步。 ◆She would do her homework in the library when she studied in the university. 当她在这所大学学习时，她常在图书馆里做作业。
◆It’s a pity that you should be so careless. 很遗憾，你竟然如此粗心。
栏目 导引
Unit 2 Let’s celebrate！
4．ought to 的用法
(1) 表示出于义务、责任、道义等方面的要求而该做某事。
◆To hand must have taken
is
very
heavy
these
days.I
may
arrive
a
bit
late,
so
should be so rude
be be
could harmful to
harmful to
you
save
me
a
place?
ought to pay attention to
mmuusstt这hhaavvee些ttaakkeenn天交通很拥挤，我可能会来晚一点，请你帮我留个位置好
Section Ⅲ Using language & Writing
情态动词(二)
Unit 2 Let’s celebrate！
一、情态动词的基本用法 1．may 与 might 的用法 (1)表示允许、许可。might 在语气上比 may 更委婉。以 may/might 开头的问句在否定回答中要用 mustn’t。