an excuse for的用法和樣例：
例句
- The boy gave the teacher a song and dance about his being ill as an excuse for playing truant.
那男孩對老師撒野謊說他病了，以此用為他逃學的借口。 - I will drum up an excuse for coming to see you next week.
我要想出一個借口下星期來看你。 - He used the bad weather as an excuse for not coming.
他拿天氣不好作不來的藉口。 - We must invent an excuse for our absence.
我們必須為缺席編造一個藉口。
