(1) indicates that "class" is common in collective noun.
clothes
equipment
Luggage/luggage
jewellery
traffic
information
machine
goods
produce
scenery
(2) Abstract nouns
Abstract nouns mainly refer to the names of some abstract concepts, which are generally uncountable, have no plural form, and cannot be preceded by articles A and an. Here are some common abstract nouns:
Agricultural anger in the era of absent visit
Beautiful behavior, cancer ability, childhood
Comfort, care, confidence, courage, death
Democratic depression designs tariff economy
Education can help the existence of environmental evils.
Experience failure, belief and fear.
Financial freedom, happiness, growth and happiness
Health helps historical independent industries.
Insurance information, happy and just labor
Lonely love, luck, magic marriage
Kindness music is natural, patient and peaceful.
Philosophical happiness policy, poverty power
Pride, protection, purity, realistic relief
Religion respects security, security and silence.
Sleep intensity state technical time
Trade, training, transportation and tourism trust fund
Truth, violence, waste of wealth, weather
Welfare work worthy of youth.
(3) Material nouns
1. gas: air, gas, smoke, steam [STI: m], oxygen [> & ampKsid{+n] (oxygen), hydrogen [> Haidr+d{+n] (hydrogen), etc. ..
The most commonly used unit of measurement for gas is "m3 (cubic [> Kju:bik] meters cubic meters) or ft.3 (cubic feet/feet cubic feet).
For example, 1 m3 of natural gas takes only 65 days in the United States.
In the United States, the price of a cubic meter of natural gas is only 65 cents. )
2. Liquids: water, oil, tea, coffee, wine, beer (bi+) (beer), milk, coke (Coca-Cola), gasoline (gasoline), etc. ..
Commonly used liquid metering methods are as follows:
Cc = cm3 (cubic centimeter [cm])
L = 1000 ml (l)
Gallon = 4 liters (gallon)
Or use the weight of kilograms (kg). ), tons (ton), etc.
My new car can run 45 kilometers per gallon.
My new car can run 45 kilometers per gallon. )
3. Powdered or fine-grained articles: flour [> Flau+] (flour), salt (salt), sugar (salt sugar), rice (rice), sand (sand), etc. ..
The unit of measurement for powdery or fine granular articles usually uses containers or weights.
They sell flowers by the bag.
They sell flour by the bag. )
Note: Rice can be measured by "grain", but it is obviously impossible to measure rice by "grain" in daily life, such as how many meters to buy or how many meters a family of five needs for two meals a day, which is why "rice" is classified as a material term. However, we sometimes say that a person can write 20 words on a grain of rice if he writes well. At this time, "a grain of rice" is the correct expression, and its English is "a grain of rice". Give another example:
He ate up every grain of rice.
He ate up every grain of rice. )
4. Block objects (products): Common block objects (products) can be further divided into:
(a) Food: bread, butter, chocolate, meat (meat-beef, chicken, mutton [> mutton, pork, etc. ..
Daily necessities: chalk, paper, money, soap, etc ..
(c) Mineral: copper [> K & ampP+] (copper), gold (gold), iron (iron), silver (silver), etc. ..
(d) Raw materials/materials: brick (brick), clay, cloth (KL&; (:) I] (cloth), cotton [> K&TN] (cotton), soil (earth), glass (glass), stone (stone), wood (wood), wool (wool), etc.