clap的過去式爲什麼要雙寫P

因爲它是重讀閉音節:clapped

Everyone cheered and clapped.

人人都鼓掌歡呼。

The audience cheered and clapped.

觀衆又是喝彩又是鼓掌。

He clapped his hands for silence.

他拍手要大家安靜下來。

The men danced and the women clapped.

男人們跳舞，女人們鼓掌。

Everyone clapped us when we went up to get our prize.

我們上前領獎時，大家都爲我們鼓掌。