一 : add,addto,addupto,add...to,addup用法与区别

1.add作“加，增加”解时，既可作及物动词，又可用作不及物动词；作“又说，补充说”解时，与直接或间接引语连用。如：
If the tea is too strong, add some morehot water． 如果茶太浓了，再加点开水。
After a short while, he added that hewould try his best． 过了一会儿，他又接着说他会尽力。At last mother added he must be more careful next time.最后母亲又说下次他必须更加小心。
2.add to意为“增添，增加，增进”。如：
The bad weather added to ourdifficulties． 恶劣的天气增加了我们的困难。
He did nothing but add to our trouble.他什么也没做，只是增加了我们的麻烦。3. add upto...“总共达……；加起来达到……”,该短语不用于被动语态。如：

The cost of two trips added up to 1,000dollars. 两次旅行的费用总计达1000美元。

All his school education added upto no more than one year．他的学校教育加起来不过一年。

4. add...to...“把……加到……上”,是把前一项加到后一项之后或之中。如：

Ifyou want to eat hot things, you can addred pepper to them.如果你想吃辣的东西，可以加些红辣椒在上面。

Add these to the sandwich.把这些加在三明治上。

Add two to seven,and you will get nine．七加二等于九。

5. add up "加起来".如:

Add your scores upand you we will see who won.

Please add up all the numbersto see how much they add up to .

典型考例:

1.2003年上海卷

The engine of the ship was out of order and the badweatherthe helplessness of the crew at sea.

A.added to B.resulted C.turned out D.made up

2.2006年北京卷

There have been several neweventsto the program for the 2008 Beijing Olympic Games.

A.add B.to add C.adding D.added

Keys:1.D 2.D

二 : sometime、sometimes、some time的区别和用法

sometime、sometimes、some time的区别和用法2009-02-23　来源：合肥新东方学校　作者：合肥新东方some time与some times不要理解为词组。(www.61k.com］ 　　some time 中的time是时间的意思。 　　some times中的times是次数的意思。 　　some time： 相当一段时间　　例句与用法：　　1. After the explosion it was some time before the town resumed its everyday routines. 　　爆炸后经过相当一段时间，这个城镇才恢复了正常的生活秩序。　　2. After we had haggled for some time, we decided to the bargain, and Jones bought the cloth for50 pence per yard. 　　我们在价钱上争论了半天，终于决定，琼斯以每码50便士买下了这批布。　　3. I'm sorry to trouble you, but I wondered if we could have a word some time. 　　很遗憾要打扰你一下，我想问问我们什么时候能聊聊。 　　4. Everyone should invest some time in community service. 　　每个人都应该花些时间在社区服务上。 　　5. It took me some time to digest what I had heard. 　　我花了一些时间才把听到的东西弄明白。　　6. These ideas have been in circulation for some time. 　　这些想法已经流行了一段时间。　　7. This meat takes some time to brown properly when cooking. 　　这种肉要花点时间才能煮成恰到好处的褐色。　　8. The writer decided to live in the Sahara Desert for some time. 　　那位作家决定去撒哈拉沙漠住一段日子。 　　　　some times 几次（用法略）。 　　sometime和sometimes是单词。　　sometime：a. 以前的，某一时间ad. 改天，来日 　　例句与用法：　　1. He is my sometime boss. 　　他是我从前的上司。　　2. I hope to see you again sometime next year. 　　我希望明年某一时候再见到你。　　3. I saw him sometime last summer. 　　去年夏天的某个时候我曾经见过他。　　4. Thomas Atkins, sometime vicar of this parish 　　托马斯·阿特金斯，本牧区从前的牧师。　　5. Phone me some time next week. 　　下星期什麽时候给我打个电话吧。　　6. Let's get together sometime. 　　有时间我们聚一下吧。　　7. I want to look them up sometime. 　　我希望能去拜访他们。 　　8. It is reported that the car accident took place sometime yesterday. 　　据报导，那场车祸是在昨天某个时候发生的。 　　sometimes：ad. 有时 　　例句与用法：　　1. Sometimes the patient cried for the pain. 　　有时这个病人疼得哭起来。　　2. Sometimes I go by car. 　　有时我坐汽车去。　　3. Sometimes we went to the beach and at other times we sunbathed on the patio. 　　我们有时去

sometime sometime、sometimes、some time的区别和用法

海滩，有时在院子里做日光浴。(www.61k.com］　　4. He sometimes writes to me. 　　他间或给我写写信。　　5. The vowels in the English alphabet are a,e,i,o,u, and, sometimes, y. 　　英语的元音字母有a，e，i，o，u，有时也包括y。　　6. Love is sometimes put in range with a career. 　　人们往往认为爱情和事业是并驾齐驱的。 　　7. Mr. Smith sometimes condescends to help his wife with the housework. 　　史密斯先生有时屈尊帮他的妻子做家务。　　8. Good student as he is (=Though he is a good student), he sometimes makes mistakes. 　　虽然他是好学生，偶而也会犯错。

三 : whichever和nomatterwhich的用法区别

合在一起写的如whichever等与分开写的如No matter which等既可以引导名词性从句,也可以引导让步状语从句,而引导名词性从句时只能用whichever等这种和在一起写的连词了.如:Whichever breaks laws will be punished .=No matter which breaks laws will be punished.无论哪一个犯了法都要受到惩罚..一个先行词加一个关系代词.你用这种方法替换一下,能讲得通的就是主语从句做主语了.No matter which breaks laws, we will punish h（www.61k.com]im.无论哪一个犯了法,我们都要惩罚他.前面是一个让步状语从句.

四 : forget的用法怎么区别forgettodo和forgetdo

forget的用法

怎么区别 forget to do 和 forget doing

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1个极为简单的办法：forget to do 忘了做了 forget doing做了忘了。具体点说，前者强调没做，后者强调已经做过了

本文标题：to和for的用法区别-add,addto,addupto,add...to,addup用法与区别
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