会英语的请进1在写英语句子时候 怎么确定用be动词 be动词在什么时候用2还有那个do应该怎么用,在什么情况下要用它,.

3个回答

  • e是一个连系动词,它有自己不同的形式

    现在时:be 进行时:being 过去时:was/were 过去分词:been

    它的后面必须跟形容词或名词作表语,与之构成系表结构,充当句子的谓语.

    i am a student主语:i 谓语:am a student(系表结构)

    being是它的现在进行时态,一般不单独用,而是用于现在进行时的被动语态.(being+动词过去分词)

    the bike is being repaired.单车正在被修理中.

    it is being finished by him这正在被他完成中.

    been是它的过去分词,也不一般单独使用,而是用于现在完成时、过去完成时以及需要它的句子.

    i have been here for a long time.我已经到这里有一段时间了.

    至于你的问题,这与你想表达的意思有关.

    你的工作是什么?

    what do you do?what is your job?

    那么这里选用do和is有什么根据呢?

    第一句里面,第二个do是指你做什么,也就是你的工作,就是一个实义动词.按中文说,what you do已经足够了.可是英语里面就不行,必须跟一个助动词,也就是do.

    这里就有了一个结论:当句子中有动词时,我们就用助动词do或是does.如果没有动词时,我们就选用is或是are,也就是b“Be”除了原形的“be”之外,还有另外七种形式:am,is,are,been,being,was,were.

    在句子中,“be”可以是主动词(The Principal Verb)或助动词(The Auxiliary Verb).

    当主动词时,“be”在性质上属于接系动词(The Linking Verb),后面要有名词、形容词、地方副词或短语作补足语(The Complement).例如:

    1.The man is a science teacher.

    2.Mary's new dresses are colourful.

    3.I have been there before.

    4.Mother is in the kitchen now.

    这四个都是陈述句,可以变成疑问句,方法简单,把主语和“be”或助动词对换位置即可:

    5.Is the man a science teacher?

    6.Are Mary's new dresses colourful?

    7.Have I been there before?

    8.Is mother in the kitchen now?

    当“be”要在祈使句中出现时,它必须借重助动词“do”或“don't”之助,如:

    9.Don't be silly!

    10.Do be obedient!

    11.Don't be a fool!

    “Be”有两种缩写法,如下:

    12.He's not./He isn't.

    13.You're not./You aren't...

    但“am + not”的缩写法只有一个:

    14.I'm not.

    有人用“ain't”,但这并不是标准英语.

    谈过了“be”作主动词的功能,现在看看“be”作助动词时,有些什么用法:

    1.“Be + 现在分词”以组成进行式时态(Continuous Tenses),如:

    15.Tony's maid is washing his new car.

    16.The children are playing in the field.

    17.Samuel was eating when I came in.

    18.We have been living here since 1959.

    2.“Be + 过去分词”以组成被动语态(The Passive Voice),如:

    19.Her money in the drawer was stolen.

    20.A number of good jobs are taken up byforeigners.

    21.David studied in Taiwan but has been trained as a language lecturer in America.

    22.Can all the wonderful birds be found in our Bird Park?

    23.The disobedient boy was told to stand out- side the classroom.

    24.Steps are being taken to reduce traffic con- gestion during peak hours.

    25.Dishonest students will be immediately dealt with.

    当陈述句的谓语是实义动词时,助动词do通常用于疑问句和否定句中.如:

    I go to school every day.

    我每天上学.

    Do you go to school every day?

    你每天都上学吗?

    I don”t go to school every day.

    我不是每天都上学.

    另外,助动词do还可用于强调句中,用于强调谓语动词.如:

    将助动词do及do 的相应形式放于动词前,而动词要用原形.又如:

    I did tell him.

    我的确告诉他了.

    He does like playing football.

    他的确喜欢踢球.

    其余时候do作动词原形,表示做.