talk过去式的过去式式是什么

　　例句：

　　OK. Now, let's talk some business.

　　好了。现在，咱们谈点正事吧。

　　How dare you talk to me like that?

　　你竟敢这样对我说话？

　　The boys all began to talk at once.

　　男孩们都马上开始说话了。

　　A child learns to talk by imitation.

　　小孩子通过模仿学会说话。

　　You are not to talk during the exam.

　　考试期间不许说话。