find的过去式怎么写

　　例句：

　　1、 It's very difficult to find work at the moment.

　　目前很难找到工作。

　　2、It is difficult to find work in the present economic climate.

　　在目前这种经济大气候下很难找到工作。

　　3、Someone might find out, and that would never do.

　　也许有人会发现，那是绝对不行的。

　　4、Who would have thought to find you here?

　　谁会料到你在这儿呢？

　　5、Water will always find its own level.

　　水总会自行流平。