order的'用法：
1、表示“命令”“吩咐”，可用作动词或名词；注意相应的宾语从句、表语从句、同位语从句等用虚拟语气（should+v.）。如：
He ordered that the goods should be sent by air. 他命令货物得空运。
His order is that all the soldiers should start at once. 他的命令就是所有的士兵马上出发。
He gave orders that the work should be started immediately. 他发出指示要立即开始工作。
后接宾语从句时有时可以换成不定式或过去分词的复合结构。如：
老板吩咐这工作必须按时完成。
正：The boss ordered the work (to be) finished in time.
正：The boss ordered that the work (should) be finished in time.
2、表示“订购”，也可用作动作和名词，注意以下常用句型：
我向这家工厂定购了500双鞋。
正：They ordered 500 pairs of shoes from the factory.
正：They placed an order for 500 pairs of shoes with the factory.
3、表示“点菜”，也可用作名词（可数）或动词（及物）。如：
May I have your order, please? 请问你要点什么菜?
What shall I order for you? Steak or fish? 我给你叫什么菜? 是牛排还是鱼?