identify为什么可以做开头

因为identify开头时，是祈使句。

Identify the volatile product and comment .鉴定此挥发性产品并评述。

I found it hard to identify with any of the characters in the film.我对这部影片里的任何角色都难以认同。

She identified that the man was her attacker.她认出那个男人就是袭击过她的人。

One can not identify happiness with wealth.幸福和财富不能混为一谈。

Can you identify your umbrella among this lot?你能在这些伞中认出你自己的伞吗