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;Im freenow.一般现在时;Ive 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 Ill intrdouce myself to you all.
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 theage 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。