后面用介词of，例如：
1、He was presented with the watch on the occasion of his retirement.他在退休时获赠这块手表。
2、Her death was the occasion of mass riots.她的逝世引发了大规模的骚乱。
3、The wedding was an occasion of great festivity.这个婚礼是喜庆盛事。
occasion后面用什么介词
1/occasion释义：
n. 时机，机会场合理由
vt. 引起，惹起
2/例句：
In such an emergent occasion， I had to jump out of the car.
在这种紧急时刻，我不得不跳车。
3/occasion后面可以用下列介词：
on the occasion在那时值此…之际
special occasion特别的时刻特别的场合
on the occasion of值此…之际
on occasion有时偶尔
on this occasionadj. 这一次
