名词的格以及名词作定语的知识网络
名词的格
（一）在名词词尾加's，主要表示有生命的事物或自然界独一无二的某些空间或时间名词的所有格。
1. 复合名词所有格在复合名词词尾加's。 her soninlaw's photo
2. 如果一个事物为两个人共有，则只在最后一个名词后加's；如果是分别所有，两个名词后都要加's。
Tom and Mary's father (共有)
Tom's and Mary's fathers (分别所有)
3. 在表示“某人家”或者“店铺”的名词所有格时，后面一般省略它所修饰的名词。
at my uncle's(在我叔叔家)
at the tailor's(在裁缝店)
（二）用“名词＋介词of＋名词”构成的名词短语表示两个名词间的所有关系，多用于无生命的东西。
用“名词＋介词of＋名词”构成的名词短语表示两个名词间的所有关系，多用于无生命的东西。
the computer of tomorrow(未来的电脑)
（三）表示时间、度、量、衡时，人们习惯在这些名词后加's。表示时间、度、量、衡时，习惯在这些名词后加's。
three hours' walk(三小时的散步)
（四）注意名词双重所有格的表达形式。
注意名词双重所有格的表达形式。 a friend of my father's(我父亲的朋友中的一个)
名词作定语
（一）表示目的、用途、来源、所属等。
tooth brush牙刷 lunch room午餐室
shoe store鞋店 school gate校门口
（二）表示时间、地点等。
summer camp夏令营 street light路灯
（三）表示性质、材料、类别或性别等。
flower bed花坛 boy friend男朋友
paper tiger纸老虎
（四）表示动作的对象。
lion trainer训狮员
（五）名词作定语时常用单数形式。而clothes，parents，goods，sports，sales等少数几个名词作定语时需用复数形式。
clothes shop服装店；
sports meet运动会
Before going outside in the morning, many of us check a window thermometer(温度计)for the temperature. This helps us decide what to wear. _______1______ . We want our food to be a certain coldness in the refrigerator. We want it a certain hotness in the oven. If we don’t feel well, we use a thermometer to see if we have a fever. We keep our rooms a certain warmth in the winter and a certain coolness in the summer.
Not all the thermometers use the same system to measure temperature. We use a system called the Fahrenheit scale. But most other countries use the Centigrade scale.
Both systems use the freezing and boiling points of water as their guide._____ 2_______ .
The most common kind of thermometer is made with mercury(水银)inside a clear glass tube. As mercury (or any other liquid ) becomes hot, it expands. As it gets colder, it contracts(收缩). That is why on hot days the mercury line is high in the glass tube.______3______.
First. Take a clear glass juice bottle that has a cap; fill the bottle with coloured water. Tap a hole in the center of the cap using a hammer and thick nail. Put the cap on the jar. Then stick a plastic straw(吸管) through the nail hole.
_______ 4____________.
Finally. Place a white card on the outside of the bottle and behind the straw. Now you can see the water lever easily.
_______ 5___________.
As the temperature goes down, the water will contract, and the lever in the straw will come down. Perhaps you will want to keep a record of the water lever in the straw each morning for a week.
A. We use and depend on thermometers to measure the temperature of many other things in our daily lives.
B. Thermometers measure temperature, by using materials that change in the same way when they are heated or cooled.
C. Now that you know this rule you can make a thermometer of your own that will work.
D. The water will rise in the straw. As the temperature of the air goes up, the water will expand and rise even higher.
E. They label these in different ways. On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees. On the Celsius scale water freezes at 0 degrees and boils at 100degrees.
F. Take wax (you may use an old candle if you have one) and melt some of it right where the straw is struck into the cap to seal(把..粘住) them together.
G. People use thermometers which are made by themselves when travelling around the world.
