T-Rex most fierce predator.

[tufguy]

"T-Rex would have been the most firece hunter the world has ever known (I want to say that still in the world there is no predator like it)."

Please check.

 

[Raymott]

"T-Rex would have been the most fierce hunter the world has ever known." (I want to ... )

You quote only your example, not what you are directly saying to us.

 

[GoesStation]

The fiercest hunter is more natural.

 

[emsr2d2]

The T. rex is the fiercest hunter that has ever existed.

 

[Tdol]

T-Rex would have been

Given that you regard it as a fact, why don't you use was instead of would have been?

 

[tufguy]

Given that you regard it as a fact, why don't you use was instead of would have been?

But I am not sure about it that's why I used "would have".

 

[Tdol]

How about could have been?

 

[tufguy]

How about could have been?

"T-Rex could have been the most fiercest hunter that has ever existed."

 

[Matthew Wai]

The T. rex could be the fiercest ever hunter.

 

[emsr2d2]

Did you notice that two of us have corrected your "T-rex" to "T. rex"?

 

[GoesStation]

"T-Rex could have been the most fiercest hunter that has ever existed."

Fiercest is the superlative form. You can write "most fierce" instead but you can't combine the forms.

 

[tufguy]

Did you notice that two of us have corrected your "T-rex" to "T. rex"?

No, I have just noticed it.

 

[tufguy]

"The T.Rex could have been the fiercest hunter that has ever existed."

 

[emsr2d2]

You need a space after the "T.", before the "rex".

The two halves don't really work together. If you use "has ever existed" you are including the present day. "Could have been" doesn't work in that case.

The T. rex could be the fiercest hunter that has ever existed.

 

[tufguy]

You need a space after the "T.", before the "rex".

The two halves don't really work together. If you use "has ever existed" you are including the present day. "Could have been" doesn't work in that case.

The T. rex could be the fiercest hunter that has ever existed.

Does "has ever existed" work with "would have been?" I think you are saying that if I have to use "has ever existed", then I will have to use "present tense" without "could/would have done". Am I correct?

 

[Matthew Wai]

Having read emsr2d2's explanations above, I think no modal perfect matches the present perfect because the latter includes the present day but the former does not, so the present tense should be used.