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[izabella mroczkowska]

I'd like to know if it 's correct to say:"I have not yet finished it."
I know ,I can say :I haven't yet finished it.I am not sure about the first sentence,in which I used: "have not" instead of "haven't"
I would be grateful if you could answer my question.

[Coffa]

It is always correct to use "have not" in place of "haven't". "Haven't" is simply a contracted form.

[rewboss]

It is always correct to use "have not" in place of "haven't".

Except in one case: When you are asking a question in the negative. This is something you have to watch out for.

"Haven't you finished it yet?"

but:

"Have you not finished it yet?"

In the uncontracted form, the particle "not" moves behind the subject:

"Didn't you know?"
"Did you not know?"

"Can't he do it?"
"Can he not do it?"

"Shouldn't we go now?"
"Should we not go now?"

Note that in spoken English, the contracted form is usually the most natural, unless you want to emphasise the "not":

"I haven't finished it yet."
"No, I have not finished it."

[izabella mroczkowska]

I am not satisfied with your reply
'YET' is used with perfect tenses in negative sentences after a contracted auxiliary verb:"He hasn't yet arrived","He hasn't arrived yet" and at the end of the sentence:"Has he arrived yet?"
My question was simple:is it correct to say:"He has not yet arrived"
I am not sure about it but I have read something like this .
kind regards

[izabella mroczkowska]

I am not satisfied with your reply
'YET' is used with perfect tenses in negative sentences after a contracted auxiliary verb:"He hasn't yet arrived","He hasn't arrived yet" and at the end of the sentence:"Has he arrived yet?"
My question was simple:is it correct to say:"He has not yet arrived"
I am not sure about it but I have read something like this .
kind regards

I would be grateful if you would answer my question as simply as possible without other examples incuding "already" just" lately" and so on

[Coffa]

I am not satisfied with your reply
'YET' is used with perfect tenses in negative sentences after a contracted auxiliary verb:"He hasn't yet arrived","He hasn't arrived yet" and at the end of the sentence:"Has he arrived yet?"
My question was simple:is it correct to say:"He has not yet arrived"
I am not sure about it but I have read something like this .
kind regards

Yes. It is definitely correct. I have never ever seen it written in an English grammar textbook before that 'yet' had any connection with whether the auxiliary is contracted or not. Perhaps the author simply meant that the contracted form is used far more often (which it is)?

[MrPedantic]

Yes; "He has not yet arrived" seems to have an air of emphasis:

Ex. 1 - at the party
"What's the matter, MrZ? Who are you looking for?"
"I was looking for MissQ. Where is she?"
"What did I tell you five minutes ago? MissQ has not yet arrived. Don't worry – I'll tell you when she gets here..."

MrP

[Casiopea]

Welcome, Izabella.

[I]s it correct to say: "He has not yet arrived"?

I agree with the "panel". It's 'correct'. "not" modifies "yet",

He has not yet arrived. <"not" modifies "yet">
He hasn't yet arrived. <contracted "not" modifies "has">

[Casiopea]

MrP, glad to have you on board.