I have been in Haikou over six months before you can say Jack Robinson.

转眼间在海口生活了六个多月。

I haven't written my blog for two weeks before you can say Jack Robinson.

转眼之间，我已经有两周时间没写博客了。

She feels to swallow a fly and her mood declines to freezing point before you can say Jack Robinson.

莉莉像吃了苍蝇似的，情绪一下子滑落到冰点。