后面带有now是什么时态
now表明句子的时态应该是现在时态，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 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Now I\'ll intrdouce myself to you all.
The pressure now was relentless.
压力现在毫无减弱之意。
The TV works perfectly now.
这台电视机现在效果好极了。
She\'s in kindergarten now.
她现在在上幼儿园。
