按要求完成下面各题。1. Thisisabignaturepark.(变为感叹句) 2. Thetigersareswimming.(对画线部分提问) 3. Fishcanswim.(改为一般疑问句) 4. Whatisthepandadoing?-五年级英语

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比较shall和should:   
1).shall 用于第一人称,征求对方的意见。   
What shall we do this evening?   
2).shall 用于第二、三人称,表示说话人给对方的命令、警告、允诺或威胁。   
①. You shall fail if you don’t work hard.(警告)   
②. He shall have the book when I finish it.(允诺)   
③. He shall be punished.(威胁)  

will和would的用法:
1.表示请求、建议等,would比will委婉客气。如:
Would you pass me the book?
2.表示意志、愿望和决心。如:
I will never do that again.
They asked if we would do that again.
3.用“will be”和“will(would) + have + 过去分词”的结构表示推测,主要用于第二、三人称。
前者表示对目前情况的推测,后者表示对已经完成的动作或事态的推测。如:
This will be the book you want.
He will have arrived by now.
The guests would have arrived by that time.
I thought you would have finished this by now.
4.will表示习惯、请求,固有性质等。
Everyday he will sit here hour after hour doing nothing.(习惯)
Will you help me with my English?(请求)
The door won't open. (固有性质)
5.Would可表示过去反复发生的动作或某种倾向。
Would表过去习惯时比used to正式,并没有“现已无此习惯”的含义。如:
The wound would not heal.
During the vacation he would visit me every week。
6.表料想或猜想。如:
It would be about ten when he left home.
What would she be doing there?
I thought he would have told you all about it.

  • 情态动词用法口诀:
    情态动词两特点,动词原形接后面,说话语气较委婉。
    can"能力"may"许可",must"责任"或"义务"。
    否定回答needn’t换,"需要"need,dare"敢"。
    should"应该",would"愿",haveto"被迫"表客观。

  • 情态动词表示推测的用法:
     can, could, may, might, must 皆可表示推测,其用法如下:
    1)情态动词+动词原形,表示对现在或将来的情况的推测,此时动词通常为系动词。例如:
    I don't know where she is,she may be in Wuhan.我不知道她在哪儿,可能在武汉。

    2)情态动词+动词现在进行时,表示对现在或将来正在进行的情况进行推测。例如:
    At this moment,our teacher must be correcting our exam papers.这时,想必我们老师正在批改试卷。

    3)情态动词+动词完成时,表示对过去情况的推测。例如:
    The road is wet.It must have rained last night.地是湿的,昨天晚上一定下雨了。

    4)情态动词+动词的现在完成进行时,表示对过去正在发生事情的推测。例如:
    Your mother must have been looking for you.你妈妈一定一直在找你。

    5)推测的否定形式,疑问形式用can't,couldn't表示。例如:
    Mike can't have found his car,for he came to work by bus this morning.
    迈克一定还没有找回他的车,因为早上他是坐公共汽车来上班的。
    注意:could,might表示推测时不表示时态,其推测的程度不如can,may。

  • 考点名称:现在进行时,现在分词