choke的過去式怎么變化

　　例句：

　　An elderly man choked to death in his home yesterday.

　　昨天一個老人在家因窒息而死。

　　The fish bone in her throat made her choke.

　　她喉嚨中的魚骨使她哽噎。

　　Despair choked her words.

　　她絕望得說不出話來。