可以的。will和would都可用于表示推测——will用于谈论现在；would用于谈论过去，但也可用于谈论现在，只是语气比较委婉、比较不确定。如：

Ask him. He will know. 问问他吧，他大概知道。

You wouldn’t tell anyone, would you? 你不会告诉别人的，对吧?

That would be the watch you are looking for. 那大概是你在寻找的手表吧。

Sorry to be late. You will have been waiting for some time. 对不起我来晚了。你想必已等了一些时候了。

有时可后接完成式，表示对过去可能已经发生的情况进行推测。如：

That will have been Roland. He said he’d be back at 7. 准是罗兰，他说他7点钟回来。

The cost would have meant financial ruin for us. 这项开支对我们来说可能意味着倾家荡产。