The first lady of the USA, Michelle Obama visited China this spring. She with her mother and two daughters China for a week.A.stayed inB.has been inC.has bee-八年级英语

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第三人称单数

work(工作)
stop(
停止)

works
stops

-ch, -sh, s, x, o结尾

词尾+es

teach()
wash(
)
dress(
装扮)
fix(
安装)
go(
)

teaches
washes
dresses
fixes
goes

辅音字母+y”结尾

yi,再加es

fly(飞翔)
try(
尝试)

flies
tries

特殊变化的词:
be (是) - am,is,are
I am
she/he/it,名词单数都用 is
we,you,they,名词复数都用are
have (有) - have,has
I,we,you,they,名词复数都用have
she/he/it is,名词单数都用 has

助动词,不论单复数、不论什么人称都没有变化,都用 can,may,must,need,ought to 等。
而且,句子中有了助动词,谓语动词就不需要有任何变化了,即用动词原形表示。例:
We have six classes every day. 我们每天上六节课。
I often get up at 6:30. 我经常6:30起床。
Jack likes Chinese food very much.杰克很喜欢中国饮食。
We can see some pictures on the wall. 我们能看到墙上的画。

4.一般现在时常用的时间词语
常用于一般现在时的词语有 sometimes/usually/often/every day(week,year)/ now/always 等。
这些时间词语只是辅助作用,这些词语也可用于其它的时态,所以谓语动词变化才是最关键的。
注意:当表现强烈的感情色彩时,尽管有如 always/never/seldom 等频率副词,但一般在频率副词前加上be动词,后面变为动词的现在分词形式。
例:My father lose his key again. He is always losing his key.

  • 一般现在时的基本结构:


    一般现在时中当主语为第三人称单数的时,动词上要改为第三人称单数形式。

  • 考点名称:过去完成进行时

    • 过去完成进行时
      就是相对过去的某个时刻来说已经对现在有直接影响并且还在进行的动作。放在间接引语或虚拟语气中时它的时态不能再向前推,向后推是现在完成进行时。
      过去完成进行时是由"had been+现在分词"构成。
      例如:She had been suffering from a bad cold when she took the exam.
                  她在考试之前一直患重感冒。

    • 特点:
      1.这种时态很少用在否定句中,而多以过去完成时代替:
      He had not practised English for many years.(普通说法)
      He had not been practising English for many years.(少见)

      2.这种时态还可用在said,supposed等引起的间接引语中,代替现在完成进行时:
      He said,“I have been speaking to John.”= He said that he had been speaking to John.

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