Wrong structure for a negative verb

A large number of murderers are not receive the death penalty.

It is not really make sense.

Capital punishment is not provides any advantages.

A large number of murderers are not receive the death penalty.

It is not really make sense.

Capital punishment is not provides any advantages.

... were in the present simple.

... had a main verb ("to receive", "to make", and "to provide")

... were in the negative form.

You will need "do not" or "does not" depending on the subject

"do not + V1" for "I", "you", "we", "you", and "they".

"does not + v1" for "he", "she", "it"

A large number of murderers do not receive the death penalty.

It does not really make sense.

Capital punishment does not provide any advantages.

Easy! You would need "did not + V1" for all subjects.

A large number of murderers did not receive the death penalty.

It did not really make sense.

Capital punishment did not provide any advantages.

Easy! You would need "will not + V1" for all subjects.

A large number of murderers will not receive the death penalty.

It will not really make sense.

Capital punishment will not provide any advantages.

You need "have not + V3" for "I", "you", "we", "you", and "they".

You need "has not + V3" for "he", "she", and "it.

Prices have not risen in the past decade.

The price of this product has not risen in the past decade.

Just add "not" after the right form of the verb "to be"

Students are not afraid of ....

The number of students is not increasing.

I was not listening to the teacher when he called my name.