begin的過去式和過去分詞形式是什麼

例句：

Everyone began talking at once.

大家同時開始講話。

Academically he began to excel.

他開始在學術上脱穎而出。

He began to perspire heavily.

他開始大量出汗。

American forces have begun a big landing.

美軍已經開始大規模的登陸。

Rain had begun to streak the windowpanes.

雨已開始在窗玻璃上留下條痕。

Jesse has begun to outshine me in sports.

傑西開始在體育上使我相形見絀。