J. 定语从句

A nation which stopped working would be dead in a fortnight. 一个国家要是停止工作，不出两周就会灭亡。

Anybody who should do that would be laughed at. 谁要是那样做,谁就会被人耻笑。

Any person who had behaved in that way would have been dismissed. (CGEL) 如果有谁这样干了的话,早就被开除了。