forget的過去式和過去分詞和現在分詞

例句：

Neither of us forgot about it.

我倆都沒忘記它。

I forgot to ask him for his address.

我忘記向他要地址。

I keep forgetting it's December.

我總是忘了現在是12月份。

Forgetting my notes made me look stupid.

我忘了帶筆記，弄得自己像個傻瓜。

I feel awful about forgetting her birthday.

我忘了她的生日，感到很難過。