請(qǐng)假用英語(yǔ)怎么表達(dá)

　　I have to ask for leave tomorrow morning.

　　我明天上午得請(qǐng)假了。

　　If I were to ask for leave, would he agree?

　　如果我請(qǐng)假，他會(huì)答應(yīng)嗎？

　　He went to the headmaster to ask for leave.

　　他為請(qǐng)假找了校長(zhǎng)。