as well 可以直接用于just后，用作應答語(yǔ)（可視為It's just as well、的省略），作“幸虧，幸而；無(wú)妨；沒(méi)關(guān)系”解。

　　例句：

　　We might as well finish up the cake.

　　我們倒不如把蛋糕吃完。

　　She doesn't play as well as her sister.

　　她演奏得不如她姐姐。

　　Anyway, you're here; you might as well stay.

　　無(wú)論如何你已在這里，你就留下來(lái)吧。