person, 无性别之分，常用于数目不太大，而且数目比较精确的场合。

　　people, 泛指“人们”，表示复数概念。

　　man,前不带冠词而且单独使用时，指“男人”，a man 可指“一个人/ 一个男人”，复数形式为men.

　　He was the only human on the island.

　　There are only three persons in the room.

　　There are many people there.

　　Man is stronger than woman.

　　4. seem 连系动词，好像，似乎，看来。有下面几种用法：

　　seem + 名词 看起来。He seems a nice man.

　　seem like 好像，似乎。 It seemed like a good idea at the time.

　　seem to do sth. 似乎/看起来/好像做某事。 I seem to have left my book at home.

　　It seems/seemed that 看起来好像…, 似乎…. He was very happy.

　　seem to be + 形容词/名词 = seem + 形容词/名词。 She seems to be happy.= She seems happy.

　　5. probably ad. maybe 相当于 perhaps. 也许，大概，可能。作状语.

　　probably 用于句中，可能性最大。 He will probably come tomorrow.

　　maybe/perhaps 用于句首。 Maybe/Perhaps you are right.

　　1. during / for / in 介词，在……期间。说到某事是在某一段时间之间发生的用during; 说到某事持续多久则用for; 说到某事具体发生的时间用in.

　　We visited many places of interest during the summer holiday.

　　I’ve been here for two weeks.

　　They usually leave school in July.

　　一般将来时结构：