人教版九年级英语第八单元知识点总结
Unit 8 It must belong to Carla.
一.单?/p>
whose
truck
picnic
rabbit
attend
valuable
pink
anybody
happening
noise
policeman
wolf
uneasy laboratory outdoors coat sleepy land alien run after suit express all the same time circle
Britain mystery receive historian leader midsummer medical purpose prevent energy position
burial honor ancestor victory enemy period hard-working
情态动词表推测:语?/p>
+
时?/p>
(一)情态动词表推测的三种语?/p>
1.
在肯定句中一般用
must (
一?/p>
)
?/p>
may
(可能)?/p>
might / could
(也许,或许)?/p>
He must/may/might know the answer to this question?
他一?/p>
/
可能
/
也许知道这个问题的答
案?/p>
2.
否定句中?/p>
can
?/p>
t /
couldn
?/p>
t(
不可?/p>
), may not/might not(
可能?/p>
)
?/p>
It can
?/p>
t/couldn
?/p>
t be the headmaster. He has gone to America.
这不可能是校长,他去美国了?/p>
3.
疑问句中?/p>
can/could (
能„?/p>
?)
?/p>
Could he have finished the task?
他可能把任务完成了吗?/p>
(注:以上三种句式中情态动词的语气按程度都是依次递减的?/p>
Might, could
并非
may, can
的过去式,而表示语气较为委婉或可能性较小?/p>
(二)情态动词表推测的三种时?/p>
1.
对将来情况的推测,用“情态动?/p>
+
动词原形”?/p>
She must / may / might / could arrive before 5.
5:00
前她一?/p>
/
可能
/
也许到?/p>
2.
对现在或一般情况的推测,用“情态动?/p>
+ be
”,“情态动?/p>
+be doing
”或“情态动?/p>
+
动词原形?/p>
?/p>
1
?/p>
He must / may / might / could be listening to the radio now.
?/p>
2
?/p>
He can
?/p>
t ( couldn
?/p>
t ) / may ( might ) not be at home at this time.
?/p>
3
?/p>
Mr. Bush is on time for everything. How can ( could ) he be late for the opening ceremony ?
布什先生一向准时,这次开幕式他怎么可能迟到呢?
3.
对过去情况的推测,用“情态动?/p>
+ have +
过去分词”?/p>
?/p>
1
?/p>
It must / may / might / could have rained last night .The ground is wet.
?/p>
2
?/p>
The door was locked. He can ( could ) not / may ( might ) not have been at home .
门锁着,他不可?/p>
/
可能不在家?/p>
?/p>
3
?/p>
Can / Could he have gotten the book
?/p>
难道他找到书了吗?/p>
总结:对某一次的推测句型有两部分:语气和时?/p>
语气部分:(以下情态动词语气由强至弱)
肯定句:
must
?/p>
may
?/p>
might
?/p>
=could
?/p>
否定句:
can
?/p>
t
?/p>
=couldn
?/p>
t
)?/p>
mayn
?/p>
t
?/p>
mightn
?/p>
t
疑问句:
can
?/p>
could
(语气更加委婉不确定?/p>
时态部分:
be
表示对现在的推测
have done
表示对过去的推测
be doing
表示对正在进行的推测
语气部分写在前时态部分写在后,组合在一起就是推?/p>
There be
句型表推?/p>
There+
情态动词+
be/do sth
There+
情态动词+
be doing sth