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看到now用什么时态


    用现在时态,包括现在进行时,一般现在时或现在完成时。如:He is playing basketball now.现在进行时;I'm free now.一般现在时;I've finished my homework now,so I can go out with you.现在完成时;不过,有时候用其他时态也是可以的,如一般将来时。如:Now I'll intrdouce myself to you all.
    看到now用什么时态
    几个基本时态标志词:
    1、一般现在时
    标志:always,usually,often,sometimes,every week(day,year,month…),once a week,on Sundays,
    结构:①be动词;②行为动词
    2、一般过去时
    标志:ago,yesterday,the day before yesterday,last week(year,night,month…),in 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.
    结构:①be动词;②行为动词
    3、现在进行时
    标志:now,at this time,these days,etc.
    结构:am/is/are+doing
    4、过去进行时
    标志:at this time yesterday,at that time或以when引导的谓语动词是一般过去时的时间状语等。
    结构:was/were+doing
    5、现在完成时
    标志:recently,lately,since…for…,in the past few years,etc.
    结构:have/has+done
    6、过去完成时
    标志:before,by,the end of last year(term,month)......
    结构:had done
    7、一般将来
    标志:tomorrow,next day,soon,in a few minutes....
    结构:1、be going to;2、will/shall do
    8、过去将来时
    标志:the next day,the following month
    结构:1、be going to do;2、would /should do
    这里列举的都是最基本的,具体题型中还有很多变化。
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