您好，Case: 情况（例证，事实）。 eg. In this case time has not been taken into account. Circumstance:情况（指某事或动作发生时的情况，多用复数）。 eg. The circumstances are now unfavorable to the enemy. Condition：常用词，用作单数形式，表示人或物目前所处的真实具体状态，尤指内在状态，可与state替用； eg. The doctor says his condition is better. 用作复数形式时，笼统地表示一般状态。 eg. Conditions have changed greatly since my last visit to his factory. Position: 有利的状况（如竞争中或战争中的）; (尤作单数)处境，情势（尤指影响某人行为的能力）。 eg.I am not in a position to help you. Situation: 一般用词，尤指处于某时期的状况，处境，局面，形势。指各种具体情况综合起来的状态，多指危急或重大的事态，强调外部因素对该事态的影响，常用作单数形式。 eg. The international situation is favorable to us. State: 常用词，只人或物所处的外表、心理、健康及所处的情形等方面的情况，但不如condition具体，只用作单数形式。 eg. The house was in a dirty state. surrounding 多指具体的环境，周围的环境 The building has very beautiful surroundings.也可指抽象的环境，但主要指起影响作用的环境。希望我的回答对您有帮助，祝您英语进步！
罂粟女孩
