The deadliest thing the human has ever made is a/the nuclear bomb/bombs.

[thehammer]

Hello, I am having trouble with subject-verb agreement to make up the following sentences.

1- The deadliest thing the human has ever made is a nuclear bomb.
2- The deadliest thing the human has ever made is nuclear bombs.
3- The deadliest thing the human has ever made is the nuclear bomb.

To me 1 and 3 seems fine. The second has to be "The deadliest things the human has ever made is a nuclear bombs."

 

[Barque]

"The human" sounds odd, as if you're a non-human talking about a specific human. You need "humans".

1- The deadliest thing the human has ever made is a nuclear bomb.

Grammatical, but I wouldn't say it.

2- The deadliest thing the human has ever made is nuclear bombs.

The second has to be "The deadliest things the human has ever made is a nuclear bombs."

Both are ungrammatical. There's a singular-plural clash in both. You need The deadliest things humans have ever made are nuclear bombs.

I wouldn't use this either. If you replaced 'nuclear bombs ' with 'guns', it'd sound better. That's probably because we know there are many different types of guns. The average man doesn't know much about nuclear bombs.

3- The deadliest thing the human has ever made is the nuclear bomb.

This could work with the change to "humans". The deadliest thing humans have ever made is the nuclear bomb.

 

[Tarheel]

Try:

The deadliest weapon ever invented was the nuclear bomb.

Or:

The deadliest weapon ever invented by man was the nuclear bomb.

The word "human" doesn't work there very well, and "the human" is worse.