You should have mentioned it before now.

你之前应该提到过的。

Jewel: You couldn't tell me before now!

珠儿：在之前怎么不告诉我！

But before now you had to buy her books!

但欲练此法目前还得去买她的书。

Why hasn't anyone else done it before now?

为什么之前就没有人这么做哪？

But I couldn't teII you that before now.

我先前没办法告诉你。

When hast thou been so sluggish before now?

你什么时候象现在这样懒洋洋过？

Nobody knew the composition of this substance before now.

以前没有人知道该物质的组成。

When it was just a fling before now, you're the one

仅仅因为刚才有过片刻欢愉，而你正是那一个

These bills are overdue, ie should have been paid before now.

这些帐单已逾期未付.

I wanted to quit before now, slowly to accept the reality!

我要放弃以前，慢慢的地接受现在的现实吧！