fortunately的意思是“幸运地,幸亏”,常用来修饰整个句子; 一般置于句首或句尾。

Fortunately the rain stopped before we started 幸亏在我们动身前雨停了。
The weather was fine, fortunately.幸好天气晴朗。
I was late in getting to the station, but fortunately for me, the train was late too.我到大火车站时已经迟了,但是幸好火车也误了点。

［同义词］   happily, luckily
［反义词］   unfortunately