• a bowl, bowls
• a piece of fruit, a vegetable, vegetables, a piece of produce
• a banana, bananas, a bell pepper, bell peppers
• some fruit, some vegetables, some bananas, some bell peppers, some produce
• a satsuma, satsumas, an orange, oranges, a lemon, lemons
• a hand, to give the thumb's-up sign, to give the peace sign, the back of a hand
• a tomato, tomatoes, an apple, apples, a bunch of broccoli, an onion, onions, a head of cabbage
• a fish, two fish
• a flower, flowers
• a cardboard box, cardboard boxes, a carton, cartons
• an egg carton, a milk carton, an almond milk carton

• The bowl has some fruit in it.
• The bowl has a banana in it.
• The bowl has some vegetables in it.
• The bowl has a bell pepper in it.
• The bowl has some produce in it.
• This is fruit.
• This is a vegetable. These are vegetables.
• This is a fish. These are fish.

• The box has a satsuma in it.
• The box has satsumas in it.
• The basket has a satsuma in it.
• The basket has satsumas in it.
• The net has oranges in it.
• The hand has acorns in it.
• The hand has blueberries in it.
• The bowl has ramen in it.

• The basket has eggs in it.
• The egg carton has eggs in it.
• The bowls have tomatoes in them.
• The bowls have food in them.
• The bag has a cat in it.
• The basket has kittens in it.
• The baskets have vegetables in them.

Non-count nouns do not have a plural form. They do not take an -s. To count a non-count noun, a measure word, or counter, must be used.

• This is fruit. ("Fruit" is a non-count noun.)
• This is a piece of fruit.
• This is produce. ("Produce is a non-count noun.)
• This is a piece of produce.

You must learn whether a noun is count or non-count.

• This is a piece of fruit. ("Fruit" is a non-count noun.)
• This is a banana. ("Banana" is a count noun.)
• This is a vegetable. ("Vegetable" is a count noun.)
• This is a bunch of broccoli. ("Broccoli" is a non-count noun.)

Some nouns are count nouns but do not have an -s plural form.

• This is a fish. These are two fish.
• This is a sheep. These are two sheep.
• This is a deer. These are two deer.