That

[Over the top]

Hello
One of my friends always uses the relative clause that to refer to people instead of who, ex people that, a man that, I thought it's wrong as he is not a native until I found this in an article. There are many historians that we study right now that were gay, but nobody talks about them.
I want to know when to use who and that, is that standard or colloquial thank you.

[symaa]

Not a teacher, nor a native speaker.

If you replace who by that , it become informal, but we can use that with:superlative, all, none, nobody, somebody, anybody, .......
Ex:
All who/that hear him were delighted.
It was the best king who/that ever sat on the throne.
That what I had studied.

[SoothingDave]

Natives use "that" for "who" or "which" in this type of sentence frequently.

[Over the top]

Natives use "that" for "who" or "which" in this type of sentence frequently.

What do you mean by this type of sentence.

[Rover_KE]

What do you mean by this type of sentence.

The type of sentence you are asking about.

[Rover_KE]

Not a teacher, nor a native speaker.

If you replace who by that, it becomes informal, but we can use that with: superlative, all, none, nobody, somebody, anybody, .......
Ex:
All who/that heard him were delighted.

He was the best king who/that ever sat on the throne.

That what I had studied.

Rover

[symaa]

Thank you for the correction , I was very hasty that I did not check carefully my answer.Could you please tell me why did you put a cross after my last sentence?


All the best.

[5jj]

Thank you for the correction , I was very hasty that I did not check carefully my answer.Could you please tell me why did you put a cross after my last sentence

It is incorrect.

What I studied helped me in later life.
That what I had studied helped me in later life. X

[symaa]

It is incorrect.

What I studied helped me in later life.
That what I had studied helped me in later life. X

Thank you teacher, to be perfectly honest, I did not get the point .In the second sentence Why is it incorrect? As we need the past perfect for the event/action.. that happened first to avoid ambiguity.
Regards,

[Hedwig]

Thank you teacher, to be perfectly honest, I did not get the point .In the second sentence Why is it incorrect? As we need the past perfect for the event/action.. that happened first to avoid ambiguity.
Regards,

The problem with your sentence was not the tense. Read Fivejedjon's post again and compare the two sentences he wrote. He used the past perfect in both, but he omitted 'that' in one.