My uncle has always been (as) mad as a hatter, always coming up with the wildest ideas.

我叔叔一直都疯疯癫癫的，总是想出最疯狂的主意。

After working non-stop for three days, he was (as) mad as a hatter.

连续工作三天后，他已经疯疯癫癫的了。