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- every 与 each 的区别：
every 用来表整体，each 用来表个别。each 最低需是两，every 最低需是三。every adj.
every 作主用单数，each 可单也可复，作主、作定用单数，其他情况用复数。 each adj./ pron.
Every teacher knows her.
There are lots of trees on each side of the road.
Each of the road has a dictionary.
- on the earth 在地球上，作地点状语，位于句首或句末。
on earth 究竟，到底。用于疑问句或副词后，加强语气。
All the living things on the earth depend on the sun.
What on earth do you mean?
- human, 指包括男人女人孩子的“人，人类”，有别于动物,自然景物，机器等的特殊群体，也可指具体的人。
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.
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.
- 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.
6.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.
7.一般将来时的句式：
1). 肯定句：?主语（I/We）+will/shall+动词原形+(宾语)+其它
I will call you this evening.
We will win the match.
主语（He/She/It/You/They）+will+动词原形+其它
He’ll teach me English tomorrow.
Some day people will go to the moon.
They will take us to the Great Wall next week.
2).否定句：主语（I/We）+will/shall not+动词原形+(宾语)+其他
I won’t be a doctor.
We won’t leave for Beijing next week.
主语（He/She/It/You/They）+ will not+动词原形+其他
They won’t use books .
Mike won't finish middle school in one year.
3).一般疑问句：?Will+主语+动词原形+其他
Will the students go to the zoo this Sunday? (Yes, they will. /No, they won't.)
Will you leave for Beijing next week? (Yes, I will. /No, I won't.)
4).特殊疑问句：?特殊疑问词+will +主语+动词原形+其他
When will you leave for Beijing?
Where do you leave for next week?
I will= I’ll； she will = she’ll；
will not 和shall not分别可以缩写为 won’t 和shan’t。
