Someone says: “Thank you”. The other person answers: “Never mind.”
“Never mind” is usually used after an apology to tell the other person not to worry. The Correct way – Not at all or Don’t mention it

I will come and see you despite of my work in school.
We do not use the preposition “of” after the word “despite”. But we can use it after the words “in spite” and say “in spite of”. The correct way – I will come and see you despite my work in school.

Ah Beng is pale and his house is in Hougang.
The coordinating conjunction “and” should join related ideas together. In this case, there does not appear to be any link between the two halves of the sentence. The correct way – Ah Beng is pale and looks sick.

She’ll be taken in irregardless of what she has been through.
The affixes “ir-“ and “-less” convey the same meaning. It is repetitive to have both them both in one word. The correct way – She’ll be taken in regardless of what she has been through.

This is with regards to what I had said earlier during the interview.
We should also say “as regards” and “in regard to”. The correct way – This is with regard to what I had said earlier during the interview.

The reason for her low grades in Maths and English is because of her poor hearing.
It is incorrect to say, “the reason is because” or “the reason is … on account of.” The correct way – The reason for her low grades in Maths and English is that she has poor hearing.

He can’t hardly copy with work in school.
“Hardly” is considered as a negative so we do not add another negative such as “not” or “can’t”. The correct way – He can hardly cope with work in school.

Anyways, I think I was right when I said that.
“Anyways”, “everywheres”, nowheres” and “somewheres” are colloquial forms. They are sub-standard and therefore should be avoided especially in formal communication situations. The correct way – Anyway, I think I was right when I said theat.

The girl behaves like she distrusts her mother.
We use “as if: as a conjunction. “Like” is used as a preposition. The correct way – The girl behaves as if she distrusts her mother or the girl behaves like a rebel.

Because of his parents didn’t want him, he was adopted by another.
“Because of” is a preposition used with nouns that “because” is a conjunction used to join clauses or ideas. The correct way – Because his parent didn’t want him, he was adopted by another or because of the trouble, he was adopted by another.

This is the season where we give out hongbao to the poor.
“Season” is a time and not a place so we usually use “when” to refer to it. The correct way – This is the season when we give out hongbao to the poor.

He has the idea whereby nobody is allowed to bid before the start of the sale.
“Whereby” means “in which” and is normally used for arrangement or system. It can sound rather formal or even old-fashion. The correct way – He had the idea that nobody was allowed to bid before the start of the sale.

I had an enjoyable holiday with my Dad, also my Mum.
“Also” is an adverb, not a conjunction. We used “and” to link two words like this. The correct way – I had an enjoyable holiday with my Dad and Mum.

Although we enjoyed the drive, we look forward to doing it again.
“Since” introduces an idea that is the reason for the main idea. “Although introduces on idea which seems contrary to the main idea. The correct way – Since we enjoyed the drive, we look forward to doing it again or although we enjoyed the drive, we don’t be going again.

The reason why I didn’t go was because I was down with flu.
It is repetitive to use both “the reason” and “because”. We should choose to use one of the other. The correct way – The reason I didn’t go was I was down with the flu or I didn’t go because I was down with the flu.

Next week can or not?
We usually form yes/no questions by inverting the modal verb (in this case “can”) and the subject (in this case “you”}. The correct way – Can you come next week?