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初二英語情態(tài)動詞教案
情態(tài)動詞表示說話人對動作或狀態(tài)的各種觀點和態(tài)度，如需要、猜測、意愿或懷疑等。下面是小編整理的初二英語情態(tài)動詞教案，僅供參考。
初二年級英語復(fù)習(xí)情態(tài)動詞【1】
1.情態(tài)動詞表示可能
(1) may :You may be wrong here are some trips that may help you
(2) might是may的過去式，其可能性比may 小
(3) 對可能性表示推測
1)表示不太確定的推測，用may 或 might
2)表示確定的推測，用must
3)表示否定的推測，用can't
4)用副詞probably表示可能
情態(tài)動詞MUST 和 CAN
1.must 的用法：
(1)表示必須(做某事)，如：anyway, I must do ti today無論如何，今天我必須把這事給做了
(2)用mustn't表示禁止做某事，絕對不允許做某事，如:you mustn't drive a car at the age of 16
2.can的用法
(1)表示允許做某事，如：you can take photos in this museum
(2)表示不允許做某事，如：you can't speak English like that
情態(tài)動詞【2】
一、 情態(tài)動詞的特征和形式
a. 情態(tài)動詞的各種形式見下表：
情態(tài)動詞
may
might
can
could
must
have to
ought to
will
would
shall
should
need
dare
used to
否定式
may not
might not
cannotcan not
could not
must not
do not have to
ought not to
will not
would not
shall not
should not
need not
dare not
used not to
did not use to
簡略否定式
mayn't(老式英語，現(xiàn)在不常見)
mightn't
can't
couldn't
mustn't
don't have to
oughtn't to (否定句中to可省略)
won't
wouldn't
shan't (只用于英國英語)
shouldn't
needn't
daren't
usedn't to
didn't use to
b.情態(tài)動詞除ought to, used to等外，后面只接不帶to的不定式。
1.情態(tài)動詞+do
you shouldn't be so careless. 你不該這樣粗心大意。
jessica told him yesterday she might not go on the trip.
杰西卡昨天告訴他，她可能不去旅行了。
difficulties can and must be overcome.
困難能夠而且必須克服。
2.情態(tài)動詞+be doing
she must be listening to pop music.
她肯定在聽流行音樂。
you should be reviewing your lessons.
你應(yīng)該在復(fù)習(xí)功課。
my mother maymight be cooking now.
我媽媽可能正在做飯。
3.情態(tài)動詞+have done
they might have visited the great wall.
他們可能參觀過長城了。
he must have got up very early to catch the train.
他一定起得很早去趕火車了。
you ought to have come earlier.
你本該早一點兒來。
4.情態(tài)動詞+be done
this word can also be used as a verb.
這個詞也可以用作動詞。
something must be done to stop pollution.
必須采取措施來制止污染。
the work ought to have been finished long ago.
這工作早就該完成了。
c. 情態(tài)動詞第三人稱單數(shù)一般現(xiàn)在時沒有詞形變化。
you ought to wear a raincoat.
你應(yīng)該穿件雨衣。
she ought to wear a raincoat.
她應(yīng)該穿件雨衣。
plants must have oxygen in order to live.
為了存活植物必須有氧氣。
a plant must have oxygen in order to live.
為了存活植物必須有氧氣。
d. 情態(tài)動詞的時態(tài)并不是區(qū)分時間的主要標(biāo)志。在一些場合中，情態(tài)動詞的現(xiàn)在式和過去式都可以表示現(xiàn)在時間、過去時間或?qū)頃r間。
i'm afraid it might rain tonight.
我看今晚可能要下雨。
could i borrow your thermos
我可以借用你的暖水瓶嗎?
it's a nice day today. we could go for a walk.
今天天氣不錯，我們可以出去散散步。
e. 情態(tài)動詞是互相排斥的，一般不允許兩個意義相近的情態(tài)動詞連用。
【誤】soldiers must have to obey orders.
【正】soldiers have to obey orders.
軍人必須服從命令。
【正】soldiers must obey orders.
軍人必須服從命令。
【誤】can i be able to borrow two books at a time
【正】can i borrow two books at a time
我能一次借兩本書嗎?
【正】will i be able to borrow two books at a time
我能一次借兩本書嗎?
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