Can you say some verbs and the past form?

要求学生说出自己所知道的动词及其过去式。

But this year things arent quite hewing to past form .

但是今年的情况与以往不同。

On past form the slowdown seemed likely to presage a long slump.

从过去的经验来看,这种下降很可能是经济大萧条的预兆.

By now, on past form, wage pressures should be starting to burst through .

到目前为止，按过去的形式，工资压力应该开始爆发了。