Is the predicate after a variety of and variations of singular or plural What I asked is not a noun but a plural. What is the form of the following predicate

Is the predicate after a variety of and variations of singular or plural What I asked is not a noun but a plural. What is the form of the following predicate

For example:1.There is A variety of books to choose from. 2. Varieties of books are being sold at this bookstore

Every boy and every girl has a dictionary?
If two nouns connected by and don't mean the same thing, shouldn't the predicate verb be plural?
Is there an English expert who can help me explain this problem for a long time,

His teacher and friend is a beautiful girl
Every boy and every girl has the right to receive education

Is a boy and a girl singular or plural

Plural
These are two people. If the noun here can refer to a person or a profession, we need to pay attention to it
For example, the teacher and engineer refers to a person's dual identity
The teacher and the engineer are two people
Hope it works for you

Every boy and every girl----(be)very clever
Why fill in is
Is that the rule

When the structure of "each (every) + monosyllabic noun + and + each (every) + monosyllabic noun" should be divided into two separate structures, the monosyllabic verb should be used
For example:
Each book and each paper is found in its place
Every hour and every minute is important
Sometimes the second each or every can be omitted, for example:
Every man and woman has good reason to be proud of the work done by their farhers.

Look! The twins new sweeper. A are wearing B is wearing

A is plural, of course. Twins are two

Is twin singular or plural, twin?

Twin is singular, one of twins, twins is plural, twins

Is the noun after the plural singular?
I mean the noun, not the predicate

As mentioned above, there is no unique ordinal number in the world. Some proper words, idioms and musical instruments

Help me change the following words into plural
1.reason 2.child 3.photo 4.boy 5.potato 6.strawberry 7.beach 8.thief 9.scarf 10.man

reasons children potoes strawberries beaches thieves scarfs men

Change the following words into plural
1.potato 2.noodle 3.fish 4.onion

potoes
noodles
fishes
onions

That is my sister

Those are my sisters.
I wish you progress in your studies and make progress! (*^__ ^*)
If you don't, you can ask me again:)