Write down negation of the following:

If you read, you will pass.

Write down negation of the following:

John is a friend of Thomas.

Write down negation of the following:

Fifteen is greater than five.

Write down negation of the following:

Either Pramod is clever or he is laborious

Write down negation of the following:

Money is necessary for happiness.

Write down negation of the following:

It is raining and Mahanadi is flooded.

Write down negation of the following:

Pen is mightier than sword.

Write down negation of the following:

$\left|x\right|$ is equal to either $x$ or $-x$

Write down negation of the following:

It is raining and it is cool.