I want, I have, and I need are among the first words a new speaker of English learns because they are so useful in dealing with day-to-day situations.  Using these words when you write English is a little more complicated.  Examples:

TO HAVE: I have a new car.  My brother has a new motorcycle.  My sister has a bicycle.  Many people have cars.  Last year I had a Ford.  Next year I will have a Buick.  We have had many cars during my life.

TO WANT: I want a new car.  My brother wants a new motorcycle.  My sister wants a bicycle.  Many people want new cars.  Last year I wanted a Dodge.  Next year I will want a Cadillac.  We have wanted a new car for a long time.

TO NEED: I need a new car.  My brother thinks he needs a new motorcycle.  My sister needs a new bicycle.  Many people need jobs to pay for their cars.  Last year I needed a new car.  Next year I will not need a new car.  We have needed many things.

Words you can use with things that can be counted: a, an, the, this, that, these, those, one, two, three etc., many, several, few.

Words used with things that cannot be counted: some, much, little, any, none, a lot of, plenty of

Important Note: Often, the difficult task is deciding which things can be counted and which things cannot be counted.  You can count apples, fingers, dogs, dollars.  You cannot count air, smoke, water.    But what about sand?  Sure, you can count sand grain by grain, but what you are counting is grains, not sand.  What about beer?  You can count kegs of beer, or bottles of beer, but you cannot count just beer.  The same is true of coffee, dirt, gravel, snow.  You can count particles of the substance (grains, flakes, pebbles, stones), or  containers of the substance ( cups, buckets, truckfuls, shovels full) , but you cannot count the substance itself.  Money is a good example.  Most people would say that you can count money, but think about it.  What are you really counting?  dollars, quarters, pesos, lira, rubles, sacks of, rolls of but not money itself.

The word Cattle is a special case.  The word itself stands for more than one animal, but you do not count cattle - you count head of cattle, or you count cows or steers or calves.  You can have 20 head of cattle, some cattle, a bunch of cattle or 20 steers, but you cannot have 20 cattle.

1. The driver needed ten (gasolines) (gallons of gasoline) for his fuel tank.

2. The hungry crow wanted some (corn) (corns) from the corn field.

3. My car had (several) (much) flat tires last summer.

4. Martha has three (waters) (glasses of water) with every meal.

5. I like to have (many) (a lot of) (much) crackers with my soup.

6. The workers need 13 (amounts) (buckets) (grains) of sand to make the concrete.

7. We always leave (much) (many) (several) (a lot of) dollars as a tip.

8. There (are not many times) (is not much time) before the show has to begin.

9. Only (a few) (some) (many) (several) of us want to join the army.

10. Twenty (cattles) (cattle) (head of cattle) wanted to break through the fence.