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has和have是情态动词吗
谁给个英语时态表。比如现在进行时 一般现在时。现在完成时。。。就是...
答:
C) would last D)
has
lasted 本题考核谓语动词的时态。全句的意思是:“会议从开始到结束将持续整整一个星期。”句中by the time it ends表示动作要延续到将来某一时刻,因此要用将来完成时。答案是B) will
have
lasted。如果选A),因为
情态动词
must后面接动词不定式的完成时形式表示对已经发生的事情的一种肯定...
助
动词have
do be
答:
助
动词have
的用法 1)have +过去分词,构成完成时态,例如:He
has
left for London. 他已去了伦敦。By the end of last month, they
had
finished half of their work.上月未为止,他们已经完成工作的一半。2)have + been +现在分词,构成完成进行时,例如:I have been studying English for...
情态动词
CAN
答:
(3)在反意疑问句中,当陈述部分含有表示推测意义的can`t时,疑问部分的助
动词
应与can`t后面的动词在非推测情况下的用法保持一致.He can`t be a teacher, is he? 他不是教师,是吗?She can`t
have
finished her homework,
has
she?她一定没有完成家庭作业,是不是?(4)could可用于表示...
be是什么
动词
啊?
答:
She is watching TV in the room.She was watching doing her homework at this time yesterday.英语中助
动词
归纳如下:(1) am, is, are , was , were,(帮助变进行时态,帮助变被动语态)(2) do , does, did (帮助句子变疑问句,否定句,强调谓语动词作用)(3)
has
,
have
(帮助句子变...
could的用法(
情态动词
could的用法归纳)
答:
若对过去的推测,必须在can,could之后接
动词
的完成式。但此时can仍只用于否定句或疑问句,不用于肯定句;而could则可用于各种句型。如:Themoney
has
disappeared!Whocould
have
takenit?钱不见了!谁会把它拿走呢?Theycan’thavegoneoutbecausethelight’son.他们不可能出去了,因为灯还亮着。could后接动词的完成式,除表示...
it may
have
begun already.这里为什么不用
has
答:
因为may
是情态动词
,情态动词后面的动词要用原型,所以用
have
而不是
has
1.He___(
have
)to do housework at home.
答:
have
to do =have got to do,BrE.不得不,必须做 一般现在时:
has
过去时:
had
被动语态的用法表格 比如过去式被动语态用
have
+been+过去分词
答:
I 过去将来完成时,构成:“would/should
have
+been+过去分词“。I was told that the new road would have been officially opened at the end of the year. 据说年底新路将正式开通。2. 含有
情态动词
的常用被动句式 A 肯定句式:主语+情态动词+be+过去分词+by...The computer might be ...
have
在反意疑问句何时变助
动词
答:
1.
have
可以用作实义动词,那就要借助其他的助动词来变成反义疑问句,例如:He
has
a pen,doesn't he?2.have 用作助动词,构成完成时态,就直接用have的不同形态来变成反义疑问句,不用借助其他的助动词。例如 He has left for Africa, hasn't he?3.
had
better的用法相当于
情态动词
,无人称...
I+am+busy+now改为否定疑问句?
答:
5、如果一个句式没有
情态动词
/be动词/助动词,那么就用do、does、did放句首,再放主语+谓语。例如:Mike
has
an apple.一般疑问句:Does Mike
have
an apple? (助动词后面动词用原形)6、一般疑问句的否定形式也是把情态动词/be动词/助动词放句首,经常会把not与它们缩略成一个词,偶尔会把not...
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