Question

You are playing computer games,aren't you?Yes,but this is the first time I ＿ computer games

Answer 1

正确答案是：have played.

解释：
固定句型：This/It is/was the + 序数词 + time + (that)从句，句意为“这是某人第几次做某事”。
其中要求that从句（that可以省略不用）必须采用完成时态。
如果是This/It is，从句用现在完成时；
如果是This/It was，从句则采用过去完成时。
句意可以进一步解释为“截至到现在/过去某一时刻为止，某人第几次做某事”，所以从句必须用完成时态。

Answer 2

play

Answer 3

现在时 play 原型

Answer 4

play

Answer 5

玩电脑这件事延续到了现在，故应填have played

Answer 6

have played