Are all the four correct grammatically and in usage? Any difference? That that I have told you is a secret. That what I have told you is a secret. What I have told you is a secret. That I have told...
difference - That that vs That what vs What vs That - English Language ...
The semantic of what you consider to be the proper way to express this idea is actually awful, I have to say. The verb "to suppose" is used with subjects that can only be human beings: it's a verb that means "to think", roughly; therefore, in this sentence, where the subject is "that", and we know that this pronoun represents a thing, an idea, a fact, etc. but not a human being, the result is ...
grammar - What’s that supposed to mean vs what does that suppose to ...
The speaker isn't holding the thing being asked about, so by default that thing is somewhere else (not "here, in my hands") - in which case the speaker would say What's that? or What have you got there? As opposed to the speaker having something in his hands, and asking What is this thing I have here?
word usage - "What is it?" or "What is that?" (What's that?) - English ...
The 'person at Hinative' is perfectly correct. The speaker asked "What's that?" because the food was in front of his friend and not of himself.
meaning - what's the difference here between What is that? and What is ...
"It" is a subjective pronoun. "That" is a demonstrative. There is a difference. In general use, something like "What is that!" would be used when there isn't a clear object. For example, if I was looking at a flock of birds and one of them was different, I would say "Look at that!" or "Look at that bird". But if we were talking about said bird, I might say "I wonder what kind of bird it is." I ...